The Should-I-Become-A-Theoretical-Physicist-or-Experimental-Physicist? Thread

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In summary, the conversation discusses the roles and requirements of experimental and theoretical physicists. Theoretical physicists focus on understanding the deepest ideas in the universe, while experimental physicists test and refine those theories. It is believed that more talent is required to become a theoretical physicist, but both fields require hard work and dedication. There is a difference of opinion on which is more important, with some valuing the understanding of theory and others emphasizing the practical application of experiments. Ultimately, both fields are important in advancing our knowledge of the physical world.
  • #1
bogarts21
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1. What does an experimental physicist do? What does a theoretical physicist do?

2. What does it take to be an experimentalist? What does it take to be a theorist?
(In terms of ability, courses taken, skills, etc.)

3. Work conditions, career options, financial freedom, intellectual freedom, etc.
Please post so that us undergrad newbies in the field of physics would know what we're heading for. Much thanks! Keep the ball rolling and start posting!
 
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  • #2
Can we please get some responses to this? This is probably the most important question I've seen in the Academic Guidance forum in a month. We should get some excellent responses from those who have been down this road before and then sticky it!
 
  • #3
This has to be one of the most insightful threads to have been created in a while.
 
  • #4
Great thread, perhaps all the posts can be congratulating what a great thread this is without addressing the question at hand.

I'll only answer #2

It doesn't "take" anything besides hard work to become either type of physicist.
 
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  • #5
Despite what anyone claims i believe theorists are by far more important that experimentalists. Theory let's you UNDERSTAND the deepest ideas in the universe. Experiment is only important in that it tests out theories and allows us to whittle them down. For the true beauty of physics you should become a theorist.

You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

Just make sure you go into theoretical physics, if you can, everything else is stamp collecting.
 
  • #6
Philosopher_k said:
Despite what anyone claims i believe theorists are by far more important that experimentalists. Theory let's you UNDERSTAND the deepest ideas in the universe. Experiment is only important in that it tests out theories and allows us to whittle them down. For the true beauty of physics you should become a theorist.

You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

Just make sure you go into theoretical physics, if you can, everything else is stamp collecting.

I'm not necessarily sure how you can make this judgement since you are neither and many people on this forum would disagree with you. Experimental physics is just as difficult as theoretical physics. Just as biology is to physicists. You are good at what you are most skilled at. For instance I am absolutely terrible at experiments due to the fact that there are so many factors for error and I feel constrained where as I feel liberty in free thought and theory.
 
  • #7
Philosopher_k said:
Despite what anyone claims i believe theorists are by far more important that experimentalists. Theory let's you UNDERSTAND the deepest ideas in the universe. Experiment is only important in that it tests out theories and allows us to whittle them down. For the true beauty of physics you should become a theorist.

You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

Just make sure you go into theoretical physics, if you can, everything else is stamp collecting.

Dude you are ridiculous I'm sorry I took your previous posts seriously and gave you considered responses. Please go away.
 
  • #8
Just because you disagree with me does not make me wrong. If you had studied any mathematics you would be aware that you must prove your assertions.

Theory is more abstract than experiment. therefore it is "harder" on average.
 
  • #9
Philosopher_k said:
Theory is more abstract than experiment. therefore it is "harder" on average.
If you had studied any mathematics, you would be aware that there is no theorem stating abstract translates to hard :shy:
 
  • #10
Philosopher_k said:
Just because you disagree with me does not make me wrong. If you had studied any mathematics you would be aware that you must prove your assertions.

Theory is more abstract than experiment. therefore it is "harder" on average.

You've just made an entirely unsupported assertion... Where are you getting this information from?
 
  • #11
Philosopher_k said:
Despite what anyone claims i believe theorists are by far more important that experimentalists. Theory let's you UNDERSTAND the deepest ideas in the universe.

An understanding of the theory is critical in constructing experiments.

Philosopher_k said:
Experiment is only important in that it tests out theories and allows us to whittle them down. For the true beauty of physics you should become a theorist.

Not if your interest in how the physical world IS. If you are just interested in "beautiful" mathematics than fine but guess what? If experiment and theory disagree the theory needs to be changed not vice-versa.

Philosopher_k said:
You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

You need to work hard to do either. With your attitude unless you are remarkably genius you will never be any kind of scientist. Never mind that you will never have any kind of job...

Philosopher_k said:
Just make sure you go into theoretical physics, if you can, everything else is stamp collecting.

Because your personal preference is basically fiat for what every person should do? How logical! Sorry maybe the distinction between theory and experiment is not "abstract" enough for your delicate genius.
 
  • #12
Humans on average have trouble coming to grips with ABSTRACT ideas. I am not saying that you or i do, well maybe you do, but the set of skills required to suceed in experiment belong to more humans than the set of skills which are required in the field of theory. How do i know this? Experimental means mostly tinkering with machines and the physical work of observing. With enough time even morons such as you could be taught to observe correctly. It takes a true mind to be able to grasp the concepts of theory and make it easy for the experimentalists to know what they are looking for.
 
  • #13
You are senior in high school and apparently not only have you mastered all the highest level mathematics and become bored with it . You also know pretty much everything about career options in physics. Dude give it a break you have to realize how naive you are acting...
 
  • #14
"An understanding of the theory is critical in constructing experiments."

An understanding of SOME theory is important. In fact theorists make it easier for experimentalists by dumbing down their theories.

Experiment is serves just the same function as proof does in mathematics. It must be made dreadfully obvious so that the previously unknown abstract idea is made concrete. But to actually come up with the theories and to derive the laws of nature seems far more rewarding then the one who counts the electrons on a screen.
 
  • #15
lubuntu said:
You are senior in high school and apparently not only have you mastered all the highest level mathematics and become bored with it . You also know pretty much everything about career options in physics. Dude give it a break you have to realize how naive you are acting...


The sad thing is i doubt you finished the calculus stream.

I am currently teaching myself galois theory.
 
  • #16
I know of an experimentalist on these forums that would spank you silly for those idiotic, baseless assertions about theoretical physics in comparison to experimental physics. His name starts with a Z...

You don't know anything! Stop posting advice, you can't give it because you don't know anything. You haven't gone to college, you haven't worked in research, you haven't talked to any professors or worked with them, you haven't presented any posters, written a paper, given a talk, or anything relevant to the things you're talking about. You read hard books. Great.

Stop spamming your [wrong] opinions.
 
  • #17
Hadsed, are you even a physicist?
 
  • #18
Philosopher_k said:
The sad thing is i doubt you finished the calculus stream.

I am currently teaching myself galois theory.
Philosopher_k said:
Hadsed, are you even a physicist?
Why are you so afraid to reply to the actual posts? You have no argument, you're caught out cold making ridiculous statements that don't even make any sense. If lubuntu or I have said anything wrong, please address the appropriate points. I don't ask you if you're actually a certified idiot because that has nothing to do with the points you make. It's called ad hominem and there's no place for that in debate.
 
  • #19
The question still stands. It seems to be you who is afraid of the question.
 
  • #20
Philosopher_k said:
Theory is more abstract than experiment. therefore it is "harder" on average.

Philosopher_k said:
I am currently teaching myself galois theory.

Provided a counterexample to your claim? Mathematical implications are cake, physical ones are tough. I'm an aspiring theorist myself, but only because I'm too clumsy to be an experimentalist. You should try experimental research (if you haven't done so already) and compare the difficulty first hand.
 
  • #21
Philosopher_k said:
You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented.

Philosopher_k said:
JIf you had studied any mathematics you would be aware that you must prove your assertions.

Pot. Kettle. Black.

Philosopher_k said:
Hadsed, are you even a physicist?

Pot. Kettle. Black.

Let me repeat what I said in your last thread - it is hard to believe you are as smart as you say you are when you keep posting such dumb things. It would be valuable for you to consider that other people might have valid points, particular those who have traveled farther than you on the path to being a physicist (which is pretty much everybody) and to think twice before you post.
 
  • #22
bogarts21 said:
1. What does an experimental physicist do? What does a theoretical physicist do?

Experimental physicists build and design experiments which provide data, which theorists look at. Theorists then build models, which them point the experimentalists in the direction to go in when the build the experiments.

2. What does it take to be an experimentalist? What does it take to be a theorist?
(In terms of ability, courses taken, skills, etc.)

Experimentalists tend to need more engineering skills. Theorists tend to be math people often with hard core computer skills. The coursework tends to be very similar. Experimentalists tend to be gadget people.

3. Work conditions, career options, financial freedom, intellectual freedom, etc.

Don't expect to get a research professorship but the skills that you get in either theory or experimental physics Ph.D.'s tend to be very useful in industry.
 
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  • #23
Philosopher_k said:
Despite what anyone claims i believe theorists are by far more important that experimentalists.

And I think you are being foolish extremely here.

You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

I think that you really have to seriously change your attitude if you have any hope of doing something useful in physics.
 
  • #24
Philosopher_k said:
Theory is more abstract than experiment. therefore it is "harder" on average.

Theoretical physics really isn't that much more "abstract" than experimental physics. Theoretical physics is highly computational, and so most theorists have some level of computer skill.
 
  • #25
Philosopher_k said:
Hadsed, are you even a physicist?

I have a doctorate in theoretical astrophysics, and frankly you don't have any clue what you are talking about here.
 
  • #26
Philosopher_k said:
But to actually come up with the theories and to derive the laws of nature seems far more rewarding then the one who counts the electrons on a screen.

That's not how things work, but I'm not sure whether you care how things really work.
 
  • #27
twofish-quant said:
I have a doctorate in theoretical astrophysics, and frankly you don't have any clue what you are talking about here.

Being able to say that line alone must make the Ph.D worth it, even without the cushy Wall Street job. :wink:
 
  • #28
To really answer the question we have to briefly examine what science is. Science consists of two main parts. 1. We observe the world around us. 2. We try to explain those observations and make predictions based off of those explanations. These predictions are then verified by more observations. And so on and so forth. Experiment covers the first part, theory the second. Then we loop back to experiment and the process starts over.

The main point in all of this is that science is, in the end, an inductive form of logic. We start with an assumption (meaning a statement that is not proven true using only the rules of logic). Our assumption is that the initial trend or pattern we observe in nature is true. From that assumption, we then build a model or theory and make predictions.

An example is probably a good idea about now. Let's call out scientist "Newton" :

1. Assumption: Newton's observes that F=MA (This is an assumption because we cannot mathematically prove that F=MA. It is an observation.)

2. Theory: Newton then devises a theory explaining the motion of objects including planets around the sun, balls on inclines, etc. He predicts the periods of planetary orbits.

3. These predictions are backed up by observations of the planetary orbits, giving evidence that our initial assumption is true, and not just something we make up.

In short, ideally, science is an inductive system of logic. The initial inductive statement is supported by the scientific method.

The is different than pure mathematics, which is a deductive system of logic. There is no initial statement in the argument that is assumed to be true. All mathematical proofs start only by assuming the fundamental rules of logic agreed upon by all.

So, in science, theory and experiment are equally important! It is not science unless both are happening. With only one or the other, a crucial step is left out of the argument. Without experiment, theory has no way to verify the initial inductive statement, and thus the argument fails entirely. Without theory, we are not able to link together observations in a coherent manner.

I have to get back to work now, but more on what actual experimental and theoretical physicists do in my next post.
 
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  • #29
So, now to answer what real theorists and experimentalists are like:

Just to give you some background on where this answer comes from: I am a Ph.D. student in physics, about to finish my Masters in Physics. I spend all day, every day surrounded by physicists, experiment and theory, so I think I can at least give an overview of what each discipline is like. Personally, I am an experimentalist.

Any real physicists, in either discipline, needs to have an understanding of the other. The Theorists in the high energy group in my department spend a lot of their time talking about what we will see in the LHC. In order to do this they need to know how particles are detected at the LHC. They don't need to be able to put together the ATLAS detector from memory, but they have to be familiar with the experimental methods, otherwise, they can't really give any productive insight into what new discoveries will look like.

On the opposite side of the coin, a good experimentalist must have an understanding of theory. A high energy experimentalist has to be well versed in Quantum Field Theory. If they don't understand how elementary particles will scatter, how will they ever be able to design good detectors? Thus, to imply that experimentalists are essentially monkeys with wrenches "counting electrons on a screen" is just plain wrong, not to mention insulting.

Now what skills will one develop when they become a theorist:


Obviously, being good at math is important, but there is much more to real theoretical work. You will most likely not be working with the fundamental equations of the universe! You'll have to learn approximation methods, which is arguably not the most interesting thing one learns in theory! You'll have to be able to use perturbation methods is all fields. In condensed matter theory, you'll spend time learning approximation methods like Hartree-Fock, density functional theory, etc. etc.

You will have to learn numerical and computational methods to help you produce results. Few non practicing theorists realize how important computers are to modern science. Whether you are doing simulations of protein folding or Lattice QCD, computers are essential to modern day theoretical work. Expect to spend a lot of time learning computational methods as a theorist.

It's not all cups of tea and blackboards!

What skills do experimentalists need?

Experiments that involve a person physically counting dots on a screen do not exist is modern day physics. Anyone who says that that is what goes on in a real physics lab might as well be saying that experimentalists spend their days rolling carts down ramps and measuring g over and over again!

Many experiments involve lots of automation. Expect to learn how to interface devices (oscilloscopes, lock in amplifiers, motion controllers, laser oscillators) with computers. You will also get very good at programming in experiment!

Chances are you will need to build many of the components for your experiment yourself! No one has done that experiment before, why should anyone sell the stuff you need? It's quite possible that you'll need to take a machine shop class along with that quantum field theory course next semester!

You've worked through all the theory from QED and understand how stimulated and spontaneous emission arise from the quantization of the electromagnetic field? (You will do this in a graduate quantum course, regardless of discipline.) That's great, but can you build a laser cavity and tweak the mirrors such that you get your oscillator to mode lock so you can get the femtosecond pulses you need? You will need to be able to understand how real lasers work. Trust me, it goes way beyond stimulated and spontaneous emission!

Also, I won't lie, expect to do some grunt work! Can you replace piping or a water pump when a cooling system breaks down? Effectively transfer liquid helium? How about soldering? Designing circuits?

Experimentalists learn WAY more than just Quantum Mechanics and E&M in grad school! Some of the experimentalists I have met are they most mathematically able people I know, and they are also some of the most well rounded, capable people I've ever met!

The moral is that both experiment and theory require much more than physics lectures imply! It's hard work, but very rewarding if you enjoy it!

Finally it can't hurt to post another link: https://www.physicsforums.com/showthread.php?t=240792
 
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  • #30
Thanks for the very detailed answer G01. I was wondering about the differences myself.
 
  • #31
Career Options

The general rule of thumb is that there is more money available for experimental or applied work. This is just the way the world is. In an ideal world, both theory and experiment would have as much money as they needed, but the world is just not perfect.

Usually this means it is a bit easier for experimental students to get funded RA's. The theory students I know have spent more time teaching in grad school to make up for this.

Also, you can argue that experimentalists usually have more job options since they have experience that companies outside of academia seek. (Not to say that theorists don't, but knowing how to design circuits and service lasers won't hurt your chances of getting a job in industry.)

That said, you should do what you enjoy the most! Neither experiment or theory will make you rich.

Conclusion

I hope this has helped clarify what experimental and theoretical physicists do. It's not a complete answer, and the only way to truly figure it out is to study physics and get an internship in a research group. I encourage any physics undergrad to get some research experience before you graduate. It can really help you determine your future career prospects.

I know at times it may have sounded like an apologetic for experimentalists. Forgive me, but I had to defend my discipline just a bit given the things said about experimentalists in this thread. Speaking of which:

One final note to Philosopher_k

In my experience, there is one unspoken rule in the culture of physics: "If you don't know what your talking about, don't say anything! Instead, listen and learn." Physicists really respect people who know how much they don't know. Physicists have very little patience for those who pretend to know things they don't. And in this field, it is easy to tell apart those who know their stuff, and those who don't. So, you are going to need to change your attitude/approach if you really intend to become a physicist.

Please don't make assumptions about what experimentalists or theorists do. You don't know. You are neither, and I doubt you know many at this stage of your life. No actual theorist worth their salt would ever claim that experimentalists don't understand physics theory and need it "dumbed down" for them. That is an absurd statement! You're a high school student! How can you possibly know what either type of physicist studies in their second year of undergraduate work, let alone in grad school?!

Theorists respect their experimental colleagues, and vice versa. If you really want to be a physicist, you'll need to grow up and change your attitude.
 
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  • #32
Philosopher_k said:
Despite what anyone claims i believe theorists are by far more important that experimentalists. Theory let's you UNDERSTAND the deepest ideas in the universe. Experiment is only important in that it tests out theories and allows us to whittle them down. For the true beauty of physics you should become a theorist.

You need quite a lot of talent to become a theoretical physicist. Experimental physics is for those less talented. I am not a theorist yet, but i believe i have a spark of the talent required for it.

Just make sure you go into theoretical physics, if you can, everything else is stamp collecting.

Why are you giving this advice when you're still in high school?
 
  • #33
As far as i am concerned mathematics far outshines any form of physics. Be it theoretical or experimental.
 
  • #34
Jack21222 said:
Being able to say that line alone must make the Ph.D worth it, even without the cushy Wall Street job. :wink:

Well, personally I think that argument from authority is non-sense. I may have a Ph.D. in astrophysics theory, but I'm totally clueless about certain things, and even on the things I know something about, I'm often wrong.

This is why it's really important to be humble about what you know and what you don't.
 
  • #35
Philosopher_k said:
As far as i am concerned mathematics far outshines any form of physics. Be it theoretical or experimental.

You might try to figure out *why* you think this. One place to start is figuring this out is to look at your parents and the people close to you to see what they believe. Once you get there, you can figure out why they believe what they believe, and then go into a historical detective story to figure out where all that came from. I'm pretty sure you'll find yourself in Plato's Republic.

Plato expounded a theory of politics and philosophy that has been highly influential over the last two thousand years. In the Republic, he outlines a society with philosopher-kings and elevates math to the highest truth with everything derived from that. As far as I'm concerned its total non-sense, but Plato is required reading because you can figure out where the non-sense came from. Also Aristotle is required reading since I think that Aristotle got things closer to the right answer.

As far as why it's non-sense. Hierarchical social systems are wonderful if you are at top or you think you are going be at the top. They totally suck once you figure out that you aren't going to make it.
 
<h2>1. What is the difference between a theoretical physicist and an experimental physicist?</h2><p>A theoretical physicist focuses on developing and testing theories and models to explain physical phenomena, while an experimental physicist conducts experiments and collects data to test and validate these theories.</p><h2>2. Which career path is more challenging, theoretical or experimental physics?</h2><p>Both paths have their own unique challenges. Theoretical physicists must have a strong mathematical background and be able to think abstractly, while experimental physicists must have excellent problem-solving skills and be able to design and carry out complex experiments.</p><h2>3. How do I decide which path is right for me?</h2><p>Consider your strengths and interests. If you enjoy abstract thinking and mathematical challenges, theoretical physics may be a good fit. If you have a strong curiosity for the natural world and enjoy hands-on work, experimental physics may be a better fit.</p><h2>4. Are there any overlapping skills or knowledge between theoretical and experimental physics?</h2><p>Yes, there are many overlapping skills and knowledge between the two fields. Both require a strong understanding of mathematics and physics principles, as well as critical thinking and problem-solving skills. Additionally, many theoretical physicists also conduct experiments to test their theories, and experimental physicists often use theoretical models to guide their experiments.</p><h2>5. Can I switch between theoretical and experimental physics in my career?</h2><p>Yes, it is possible to switch between theoretical and experimental physics in your career. Many physicists have experience in both fields and may even switch back and forth throughout their careers. However, it may require additional education or training to switch from one field to the other.</p>

1. What is the difference between a theoretical physicist and an experimental physicist?

A theoretical physicist focuses on developing and testing theories and models to explain physical phenomena, while an experimental physicist conducts experiments and collects data to test and validate these theories.

2. Which career path is more challenging, theoretical or experimental physics?

Both paths have their own unique challenges. Theoretical physicists must have a strong mathematical background and be able to think abstractly, while experimental physicists must have excellent problem-solving skills and be able to design and carry out complex experiments.

3. How do I decide which path is right for me?

Consider your strengths and interests. If you enjoy abstract thinking and mathematical challenges, theoretical physics may be a good fit. If you have a strong curiosity for the natural world and enjoy hands-on work, experimental physics may be a better fit.

4. Are there any overlapping skills or knowledge between theoretical and experimental physics?

Yes, there are many overlapping skills and knowledge between the two fields. Both require a strong understanding of mathematics and physics principles, as well as critical thinking and problem-solving skills. Additionally, many theoretical physicists also conduct experiments to test their theories, and experimental physicists often use theoretical models to guide their experiments.

5. Can I switch between theoretical and experimental physics in my career?

Yes, it is possible to switch between theoretical and experimental physics in your career. Many physicists have experience in both fields and may even switch back and forth throughout their careers. However, it may require additional education or training to switch from one field to the other.

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