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

Draw a graph showing variation of photocurrent with the anode potential of a photocell.

Find the wrong statement.

a) An electron gun is to create electrons and then accelerate them to a very high speed
b) Thermionic emissions and photoelectric emissions are the same
c) The kinetic energy of photoelectrons vary
d) Vacuum tubes are thermionic devices

Describe how the feature of the photoelectric effect that cannot be explained by the wave theory of light is explained by the photon theory of light.

What is Hallwachs observation of the photoelectric effect$?$

In Hertz's experiment for electromagnetic waves the cause for emission of negatively charged particles is _____ light falling on metal surface.

The threshold wavelength of a photocathode to emit photoelectron is ${\lambda }_0$. The average KE of the photoelectron is _____$\times \left(\frac{1}{\lambda }-\frac{1}{{\lambda }_0}\right)$, when a radiation of wavelength $\lambda$ is incident upon it.

_____ emission is known as quick electron emissions.

Thermionic emissions are related to the _____.