Photons and Photoelectric Effect

Revise with Concepts

Introduction to Dual Nature

ExampleDefinitionsFormulaes

Electron Emission

ExampleDefinitionsFormulaes

Learn with Videos

Quick Summary With Stories

Important Questions

Which of the following phenomenon works on the particle nature of light?

View solution
>

Light of two different frequencies whose photons have energies 1eV and 2.5eV successively illuminate a metal of work function 0.5 eV.The ratio of the maximum speeds of the emitted electrons will he

View solution
>

What is matter waves? Write any two characteristics of it.

View solution
>

The graph shows the variation of stopping potential with frequency of incident radiation for two photosensitive metals A and B. Which one of the two has higher value of work-function? Justify your answer.

1784021
expand
View solution
>

A photoelectric surface is illuminated successively by monochromatic light of wavelength   and . If the maximum kinetic energy of the emitted photoelectrons in the second case is  times that in the first case, the work function of the surface of the material is :
( Planck's constant, speed of light) 

View solution
>

In photoelectric effect, the threshold wavelength of sodium is 5000 A. Find its work function.

View solution
>

Light of wavelength 4000 is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface? 

View solution
>

Obtains Bohr's quantisation condition for angular momentum of electron orbiting in hydrogen atom on the basis of the wave picture of an electron using de Broglie hypothesis.

View solution
>

In a photo-electric effect experiment, photons of energy 5 eV are incident on a metal surface. They liberate photo-electrons which are just stopped by an electrode at a potential of -3.5 V with respect to the metal. The work function of the metal is :

View solution
>

Threshold wavelength for a metal having work function is . Then the threshold wavelength for the metal having work function 2 is

View solution
>