Embibe Experts Solutions for Chapter: Dual Nature of Radiation and Matter, Exercise 1: Meghalaya-2018

Green light ejects electron from a certain photo-sensitive surface, but yellow light does not. What will happen in case of red and violet light?

Show that the de Broglie wavelength of an electron accelerated through a potential difference of $V$ volts is$\lambda =\frac{h}{\sqrt{2 m e V}}$. 

Define work function and threshold frequency of a metal. Write Einstein’s photoelectric equation in terms of stopping potential, frequency of incident radiation and threshold frequency of a metal.

What is the effect of intensity of incident light on photoelectric current?

Derive de Broglie wave equation for material particles.

Why does photoelectric emission does not take place if the frequency of incident radiation is less than threshold frequency?

Plot a graph showing the variation of photoelectric current with anode potential for two light beams of same wavelength but different intensities.

The work function of cesium metal is $2.14 \mathrm{eV}$. When the light of frequency $6\times {10}^{14} \mathrm{Hz}$ is incident on the metal surface, photoemission of electron occurs. What is the maximum kinetic energy of the emitted electron?