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Class XII Physics Dual Nature of Radiation & Matter 4

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Question 1

The frequency and work function of an incident photon are v and φ₀. If v₀ is the threshold frequency, then necessary condition for the emission of photoelectron is

Question 2

The intensity of radiation emitted by two stars A and B are in the ratio of 16:1. The wavelength corresponding to their peak emission of radiation will be in the ratio of

Question 3

Electromagnetic radiations consisting of photons each of energy greater than the work function of metal falls on the surface of metal. If the intensity of radiation is increased

Question 4

A photon of energy hv and momentum hv/c collides with an electron at rest. After the collision, the scattered electron and scattered photon each make an angle of 45^o with the initial direction of motion. The ratio of frequency of scattered and incident photon is

Question 5

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :

Question 6

The wavelength λ_e of an electron and λ_P of a photon of same energy E are related by :

Question 7

In Davisson-Germer experiment, the correct relation between angle of diffraction

and glancing angle

Question 8

The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. Light source is put on and a saturation photo-current is recorded. An electric field is switched on which has vertically downward direction , then

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Apr 8JEE & BITSAT