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B Why there isn't a scattered photon in the Pe effect?

  1. Mar 19, 2017 #1
    We have studied the weird enough not continuous energy aka photons, And that they are like the way that waves interact with matter by giving them bursts of energy and that these photons have relativistic mass ( Before you give me the FAQ link, I have read it.). Mass is a property of energy. So it does have a momentum.

    So the question is why we don't get photons scattered after they hit electrons on the surface of the metal? Why is the energy of the photon is completely absorbed?

    One more question relating to photons, If waves deliver their energy in bursts (photons), does that mean the electrons instantly gain velocity?

    Sorry if these questions don't make sense, In HS they just say: Okay, accelerated charges radiatie, These waves carry energy independently and energy is quantized.. Given by hf... E= mc^2 ( Of course everyone knows Special relativity now, I got a book and studied it, Fascinating stuff)... Light can have momentum and treated like balls with elastic collision..... Remember Feynman's philosophy:(Shut up and calculate!)

    Honestly, It isn't physics if you don't know the math behind everything so you can get a good understanding of every situation
    Last edited: Mar 19, 2017
  2. jcsd
  3. Mar 19, 2017 #2


    Staff: Mentor

    It seems like you have a curious mind and want to know more physics. But you have a number of misconceptions, and you got a few things wrong. If we answer those, you'll just have more questions. So, rather than going through the details, I would like to suggest a course of study for you.

    Professor Leonard Susskind has a wonderful series of courses on theoretical physics. You don't need math beyond basic calculus to follow them. All are available on youtube. I found that watching 10-15 minutes per day of his stuff is a great way to learn. Find the first lecture here.

  4. Mar 19, 2017 #3
    What are the misconceptions so I can focus on them?
    I am pretty sure of my physics up to electromagnetic waves ( the concept of energy, The reason of accelerated charges emit radiation, How it is treated independently. These questions I can't answer) and the beginning of quantum mechanics.

    Do you suggest I should start from the beginning or from a certain video? as I don't have a lot of time to watch it all.
  5. Mar 19, 2017 #4


    Staff: Mentor

    A few sentences from an internet forum is not the right way to eliminate misconceptions. The real learning uses math.

    If you don't have the time to go from the start, how about starting with quantum mechanics, the 2nd in Susskind's series of courses?

    But if you have only 5 minutes to learn QM, I can't help you.
  6. Mar 19, 2017 #5
    No no, By The beginning of quantum mechanics. I don't mean the actual theory. Just how it started: Blackbody radiation, Compton effect, Photoelectric effect then we get to study atomic physics and after that nuclear physics all in about 2 months. Not to mention the other 8 subjects we have. I am in highschool and these are the topics we have for this year.

    That is still considered classical isn't?

    And of course no one can learn quantum mechanics in years. By no time, I meant I don't have a lot of time to finish this chapter. If it was summer I would totally watch the whole series
  7. Mar 19, 2017 #6


    Staff: Mentor

    I highlighted in red the incorrect things. You think that your understanding is perfect except for a few gaps. Based on what you wrote, I think you are grabbing disconnected bits and pieces from many places and putting them together incorrectly. Correcting a few misconceptions, is not the way forward. Methodical study and courses are. I wish you well in your studies.

    p.s. Susskind can teach you the essentials of QM in only 20 hours, not years.
  8. Mar 19, 2017 #7
    A great shame you did not get more encouragement here!!
    Nothing expressed here is definitive and of course you can learn something in 5 minutes.
    Not everyone would agree with the red highlighted portions in your post .
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