Someone me understanding the quantum mechanics

In summary, the photoelectric effect, black body radiation, wave particle duality, Bohr atomic model etc. are some of the topics that are not clear for you. Someone can explain and clarify them for you.
  • #1
Chemer
27
0
Hi, sorry, don't know where to post this question. I want to learn quantum mechanics and will someone please discuss with me the points like photoelectric effect, quanta, wave particle duality etc?
Thanks:)
 
Physics news on Phys.org
  • #2
You can start with the first few chapters of Eisberg's fundamentals of modern physics or Weidner and sells' Elementary modern physics.
 
  • #3
Thanks for the reply:)
Actually I want to discuss the few basic topics with someone so that I can clear my concepts about them. The photoelectric effect, black body radiation, wave particle duality, Bohr atomic model etc.
 
  • #4
Chemer said:
Thanks for the reply:)
Actually I want to discuss the few basic topics with someone so that I can clear my concepts about them. The photoelectric effect, black body radiation, wave particle duality, Bohr atomic model etc.
Well, you should say what is not clear for you so that people can explain and clarify it.
 
  • #5
in UV catastrophe, I can't understand clearly that what was the problem and how Planck solve it?
UV catastrophe was that as scientists observed colour, temperature relationship in case of a perfect black body, they expected the curve of intensity against wavelength to shift to UV side with high intensity and infinite energy,why?
and the experimental results didn't agreed with theoretical one. Planck solve this problem by considering that when an em wave is absorbed or radiated, it's energy is quantized. No, EM can be absorbed or radiated in fractions. But how this solved the problem?
 
  • #6
All right.

Lets take it one step at a time.

Exactly what isn't clear in the following:
http://en.wikipedia.org/wiki/Ultraviolet_catastrophe

Classical statistical mechanics predicted a clearly unphysical result for a black body:
'According to classical electromagnetism, the number of electromagnetic modes in a 3-dimensional cavity, per unit frequency, is proportional to the square of the frequency. This therefore implies that the radiated power per unit frequency should follow the Rayleigh–Jeans law, and be proportional to frequency squared. Thus, both the power at a given frequency and the total radiated power is unlimited as higher and higher frequencies are considered: this is clearly unphysical as the total radiated power of a cavity is not observed to be infinite, a point that was made independently by Einstein and by Lord Rayleigh and Sir James Jeans in the year 1905.'

What Plank did, by assuming the cavity could only absorb and emit radiation in discreet units the problem was solved - and actually matched experiment if a certain value was chosen for those units.

Thanks
Bill
 
  • Like
Likes vanhees71
  • #7
Braam Gaasbeek has a good introductory text to start learning quantum mechanics. Everything looks great except for the last chapter on philosophy, which I think is wrong. Philosophy in quantum mechanics is very important, and for that I recommend either Landau and Lifshitz's or Steven Weinberg's quantum mechanics texts.

http://arxiv.org/abs/1007.4184
An Introductory Course on Quantum Mechanics
Bram Gaasbeek
 
  • Like
Likes vanhees71
  • #8
Chemer said:
Actually I want to discuss the few basic topics with someone so that I can clear my concepts about them.

Post your questions, then. That's the sort of thing this forum is for! :D

It's to your advantage to post your questions publicly instead of trying to do it via a one-on-one conversation with someone via private messages. First, you'll get answers more quickly because you don't have to wait for one particular person to be available. Second, if there are errors in an answer, other people can correct them. Third, the collective knowledge of a group of people is greater than the knowledge of any single person.

Finally, the public discussion is a useful resource for everyone else, now and in the future.

However, please ask only one starting question per thread (or a very few closely related questions). Keep each thread focused on one topic. If you ask ten questions all at once in a single post, inevitably people will focus on only a few of them, and the rest will be ignored. Also, things become confusing when people try to discuss two or three or more things in parallel in the same thread.
 
  • Like
Likes vanhees71

1. What is quantum mechanics?

Quantum mechanics is a branch of physics that studies the behavior of matter and energy at a very small scale, such as atoms and subatomic particles. It explains how particles interact with each other and how they behave in different situations.

2. Why is quantum mechanics important?

Quantum mechanics is important because it is the basis of many modern technologies, such as transistors, lasers, and computers. It also helps us understand and predict the behavior of particles and systems at a microscopic level, which has led to advances in fields like chemistry, biology, and materials science.

3. How does quantum mechanics differ from classical mechanics?

Quantum mechanics differs from classical mechanics in that it describes the behavior of particles and energy at a very small scale, while classical mechanics is used to describe the behavior of larger objects. In quantum mechanics, particles can exist in multiple states at once, while in classical mechanics, objects have a definite position and velocity.

4. Can quantum mechanics explain everything?

No, while quantum mechanics is a very successful theory, it is not a complete explanation of the universe. It does not currently incorporate gravity, and there are still unanswered questions about certain phenomena, such as the observation of particles in two places at once.

5. How can I understand quantum mechanics better?

Understanding quantum mechanics can be challenging, but there are a few things you can do to improve your understanding. These include studying the mathematical concepts and principles, reading and learning from reputable sources, and seeking help from experts or joining a study group. It also helps to have a strong foundation in classical mechanics, as many concepts in quantum mechanics build upon it.

Similar threads

  • Quantum Physics
2
Replies
36
Views
1K
  • Quantum Physics
Replies
4
Views
1K
Replies
26
Views
2K
Replies
2
Views
872
Replies
15
Views
1K
Replies
2
Views
1K
Replies
21
Views
935
  • Quantum Physics
Replies
6
Views
1K
  • Quantum Physics
Replies
12
Views
613
Back
Top