A beam of light having wavelength `lambda ` and intensity 1 falls normally on an area A of a clean surface then
find out the number of photon incident on the surface.

A monochromatic radiation of wavelength lamda and intensity I is incident on a plate of area A. Find the number of photons striking the plate per second.

A light source emits a parallel beam of light of power 20 W. Wavelength of the light is 600 nm and it is incident on a perfectly absorbing surface . Find the number of photons absorbed by the surface per second and the total force exerted on the surface.

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 ……

Light of wavelength 3000 Å falls on a sensitive surface. If the surface has received 10^-7 J of energy, then the number of photons falling on the surface area is

A planar source emits a parallel beam of light of power 20 W.Wavelength of light is 600 nm and is incident on a perfectly absorbing surface. Find the number of photons absorbed by the surface per second and the total force exerted on the surface .

A beam of light of wavelength lambda and with illumination L falls on a clean surface of sodium . If N photoelectrons are emitted each with kinetic energy E , then

Light of wavelength 3000 Å falls on a sensitive surface. If the surface has received 10^-7 J of energy, then number of photons just falling on the surface area

Light of wavelength 3000 Å falls on a sensitive surface. If the surface has received 10^-7 J of energy, then number of photons just falling on the surface area