Monochromatic light of wavelength 3000 Å is incident normally on a surface of area `4 cm^(2)` . If the intensity of the light is `15 xx 10^(-2) W//m^(2)` . The rate at which photons strike the surface is `K xx 10^(13)` photon/s. The value of K is _________.

Monochromatic light of wavelength 3000 A is incident normally on a surface of area 4 cm^(2) . If the intensity of the light is 5xx10^(-2)W//m^(2) , determine the rate at which photons strike the surface

Monochromatic light of wavelength 3000 Å is incident on a surface area 4 cm^(2) . If intensity of light is 150 m W//m^(2) , then rate at which photons strike the target is

Monochromatic light of wavelength 3000 Å is incident on a surface area 4 cm^(2) . If intensity of light is 150 m W//m^(2) , then rate at which photons strike the target is

Monochromatic light of wavelength 3000 Å is incident normally on a surface of area 4 cm^(2) If the intensity of light is 150 (m W)/(m^(2)) , the number of photon being incident on this surface in one second is ……

(a) Calculate the momentum of a photon of light of wavelength 500 nm. (b) Find the number of photons emitted per second by a 25 W sourse of monochromatic light of wave length 600 nm. (c) How many photons per second does a one watt bulb emit if its efficiency is 10% and the wavelength of light emitted is 500 nm? (d) Monochromatic light of wavelength 300 nm is incident normally on a surface of area 4 cm^(2) . If the intensity of light is 150 m W//m^(2) , determine the rate at which photons strike 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.

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.