Embibe Experts Solutions for Chapter: Dual Nature of Radiation and Matter, Exercise 1: Goa Board-2019

A graph of stopping potential against incident frequency for two photo sensitive metals $A$ and $B$ is shown in the figure.

Which of the two metals $A$ and $B$ has the higher threshold wavelength?

Write the expression for the maximum velocity of a photo electron, in terms of its cut off voltage $V_{\circ }$.

 In a photoelectric emission Stopping potential is constant. Which quantity of the incident radiation is kept constant ?

In a photoelectric emission, Maximum kinetic energy of the emitted photoelectrons is constant. In each of the case, which quantity of the incident radiation is kept constant?

 Why are alkali metals most suited as photo-sensitive materials ?

An electron and a proton have the same kinetic energy which particle has the shorter de-Broglie wavelength.

An electron and a proton have the same speed. Which particle has the shorter de Broglie wavelength?

Why do bigger objects in daily life not show wave-like properties?