How can NCERT Solutions for Class 12 Ch 11 Dual Nature of Radiation and Matter help in board and entrance exams?

Variation of photoelectric current with intensity of light for a given frequency, is

n photons of wavelength λ are absorbed by a black body of mass ‘m’. The momentum gained by the body is

A photoelectric effect supports quantum nature of light because :

A. There is a minimum frequency of light below which no photoelectrons are emitted.

B. The maximum kinetic energy of photo electrons depends only on the frequency of light and not on its intensity

C. Above thresold frequency even when the  metal surface is faintly illuminated, the photoelectrons leave the surface immediately

D. Electric charge of photoelectrons is quantized

In the above true statement is :-

Young's double slit experiment the amplitude of two sources are 3a and a respectively. The ratio of intensities of bright and dark fringe will be :-

When light of maximum wavelength 300 nm falls on a photoelectric emitter, photoelectrons are liberated. For another emitter however light of maximum wavelength 600 nm causes photoelectric emission. The ratio of work functions of first emitter to second emitter will be