Home
Class 12
PHYSICS
(i) Show that a free electron at rest ca...

(i) Show that a free electron at rest cannot absorb a photon and thereby acquire kinetic energy equal to the energy of the photon. Would the conclusion change if the free electron was moving with a constant velocity ?
(ii) If the absorption of a photon by a free electron is ruled out as proved in (i) above, how does photoelectric emission take place at all ?

Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise Problem Solution|19 Videos

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise TYPE A : Problem For Self Practice|21 Videos

  • ELECTROMAGNETIC WAVES

    SL ARORA|Exercise Problem for self-practice|21 Videos

  • ELECTROSTATIC FORCES, CHARGES AND FIELDS

    SL ARORA|Exercise Problems For Self Practice|1 Videos

Similar Questions

Explore conceptually related problems

How fast must an electron move to have a kinetic energy equal to the photon energy of sodium light at wavelength 500 nm?

How fast must an electron move to have a kinetic energy equal to the photon energy of sodium light at wavelength 588 nm?

An electron and a photon each have a wavelength 1.00 nm. Find (i) their momenta, (ii) the energy of the photon and (iii) the kinetic energy of electron.

The de-Broglie wavelength of an electron moving with a velocity 1.5 xx 10^(8)ms^(-1) is equal to that of a photon. The ratio of the kinetic energy of the electron to that of the photon is:

An electron and a photon each have a wavelength of 1.50 nm. Find (i) their momenta, (ii) the energy of the photon and (iii) kinetic energy of the electron.