Question

@Jemurray3 Please help

http://physicsweb.phy.uic.edu/244/Homework/Phys244Spring2013hw1.pdf

Answer 1

What do you need help with? I don't want to just do it and give it to you...

Answer 2

well, it is our first week of class and so far we have learn about black body radiation but I don't how it relate to first question , if it does at all

Answer 3

It does, insofar as it requires a conceptual understand of how radiation works. You should consider that the frequency of a photon is proportional to the energy it carries. A photon of a very specific energy (and frequency) is required to raise the electron from energy level 0 to energy level 2. When it falls from 2 to 1, it releases a photon whose energy is equal to the difference in E2 and E1. The same is true for the transition from 1 to 0.

Answer 4

so more energy equal more frequency

and energy absorbed should be largest , hence

f_abs>f_ph

Answer 5

correct?

Answer 6

yes, that's right.

Answer 7

Though if we're being picky you should say "More energy, higher frequency"

Answer 8

also , in second question , I am thinking two ways

1)

difference between E2 to E1 is smaller than E1 to E0

so F_fl is less than F_ph

2) E2 is at higher energy level than E1 , hence

f_ph is less than f_fl

Answer 9

(1) is correct. It doesn't matter what the energy levels are. The only thing that matters is the difference in energy between the two levels.

Answer 10

thank you very much for your help; I now have at least some idea going in second week of class

Answer 11

Glad to hear it.