b. (7) Find the number of photons emitted per second. (6) Suppose the light is i

Question

b. (7) Find the number of photons emitted per second. (6) Suppose the light is incident on a Cs metal as part of a photoelectric experiment. The stopping potential is found to be 0.304 V. Find the work function of Cs c. 2) Light is known to have both wave-like and particle-like properties (10) Give an example of an experiment that supports the wave-like nature of why the experiment leads to this conclusion. a. (10) Give an example of an experiment that supports the particle-like nature of light and explain why the experiment leads to this conclusion. b.

Explanation / Answer

(a) The famous Davisson-Germer experiments show the wave like behaviour of particle. In this experiment, scatterring of electron was observed and it is found that scattering of of electron show diffraction behaviour which is wave like behaviour

(b) Photoelectric effect is the experiment which show the particle behaviour of wave. It show particle like behaviour because emmision of electron start instantly as the light irradiated on the metallic surface which appears to be happen because of collision. Also Certain minimum frequency is required and below that frequency, even the increasing intensity does not lead to emmision of electron which completely again the classical wave theory.

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