No.of identical photons incident on a perfectly black body of mass m kept at rest on smooth horizontal surface. Then the acceleration of the body if n no. of photons incident per sec. is (Assume wavelength of photon to be `lambda`):

A constant force of 20N is applied to pull a body of mass 10 k, kept on a smooth horizontal surface. What is the increase in its kinetic energy if the body starts from rest and covers a distance of 5m?

n photons of wavelength lambda are absorbed by a black body of mass m . The momentum gained by the body is

The rest mass of a photon of wavelength lambda is

The rest mass of photon of wavelength lambda is

The photons are incident on a metallic surface of frequency n . If the frequency of the radiation becomes double , the momentum of the photon

A parallel beam of monochromatic light of wavelength 500nm is incident normally on a perfectly absorbing surface. The power through any cross- section of the beam is 10 W. Find (a) the number of photons absorbed per second by the surface and (b) the force exerted by the light beam on the surface.

A parellel beam of monochromatic light of wavelength 500 nm is incident normally on a perfectly absorbing surface. The power through any cross section of the beam is 10 W. Find (a) the number of photons absorbed per second by the surface and (b) the force exerted by the light beam on the surface.

A parellel beam of monochromatic light of wavelength 500 nm is incident normally on a perfectly absorbing surface. The power through any cross section of the beam is 10 W. Find (a) the number of photons absorbed per second by the surface and (b) the force exerted by the light beam on the surface.

A parallel beam of monochromatic light of wavelength 500nm is incident normally on a perfectly absorbing surface. The power through any cross- section of the beam is 10 W. Find (a) the number of photons absorbed per second by the surface and (b) the force exerted by the light beam on the surface.