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 $10W$. What is the force exerted by it?

Q. 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 $10W$. What is the force exerted by it?

Q. 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 $10W$.

Q. A parallel beam of monochromatic light is incident normally on a perfectly reflecting surface. The incident radiation has the power as $2.1387\times {10}^{-27}\text{W}$. The force exerted by the light beam on the surface by each photon is $(h=6.63\times {10}^{-34}\text{Js})$

Q. A beam of white light is incident normally on a plane surface absorbing 70% of the light and reflecting the rest. If the incident beam carries 10 W of power, find the force exerted by it on the surface.

Q. A parallel beam of light is incident normally on a plane surface absorbing 40% of the light and reflecting the rest. If the incident beam carries 60 W of power, the force exerted by it on the surface is: