Assignment 2, Submission date: 11th Feb ,after class

Question 1

(a) What is Compton effect? Write experimental result of this effect.(b) Can we see electron by any mean? How can you explain your answer by

Compton effect.

Question 2

Photoelectric effect was well explained by assuming photon as a particle and Compton effect proved this statement experimentally. Now assume that photon is particle ( although its rest mass is zero) can we apply law of gravitation or in general Newton’s law of motion ( of course assume that photon velocity is much-much less than light velocity)

Question 3

(a) How much energy a photon must have if it is to have momentum of 10 Mev proton

(b) A monochromatic X-ray beam whose wavelength is 55.8 pm is scattered through 460 . Find the wave length of the scattered beam.

(c) A metal surface illuminated by 8.5 x 1014 Hz light emits electrons whose maximum energy is 0.52 eV. The same surface illuminated by 12.0 x 1014 light emits electrons whose maximum energy is 1.97 eV. From these data find Plank’s constant and the work function of the surface

Question 4

Boundry condition for existance of any standing wave is , if L denotes size of the

particle then show that, enegy of particle increases as L decreases. ( Note: this question is the key of quantum confinment effect, all nanoparticles technology depends on this, discuss it within frame of your answer).

Question 5

(a) What do you mean by quantum particle? Explain uncertainity principle in terms of wave or particle nature of photns.

(b) A measurement establishes the position of proton with an accuracy of .Find the uncertainty in the proton position 1.00 sec latter.

( v<<c)