A photo - cell is being operated in saturation mode . Electromagnetic radiations of wavelength `lamda` m fall upon the photo - cell . The corresponding spectral sensitivity of photocell is `JA W^(-1)` . The number of photo - electrons produced by each incident photon, is

Monochromatic radiation of wavelength lambda_(1) = 3000 Å falls on a photocell operating in saturating mode. The correspondin spectral sensitivity of photocell is J = 4.8 xx 10^(-3) A//W . When another monochromatic radiation of wavelength lambda_(2) = 1650 Å and power P = 5 xx 10^(-3) W is incident, it is found that maximum velocity of photoelectrons increases n = 2 times. Assuming efficiency of photoelectron generation per incident photon to be same for both the cases, calculate (i) threshold wavelength for the cell. (ii) saturation current in second case.

Monochromatic radiation of wavelength lambda_(1) = 3000 Å falls on a photocell operating in saturating mode. The correspondin spectral sensitivity of photocell is J = 4.8 xx 10^(-3) A//W . When another monochromatic radiation of wavelength lambda_(2) = 1650 Å and power P = 5 xx 10^(-3) W is incident, it is found that maximum velocity of photoelectrons increases n = 2 times. Assuming efficiency of photoelectron generation per incident photon to be same for both the cases, calculate (i) threshold wavelength for the cell. (ii) saturation current in second case.

A photocell is operating in saturation mode with a photocurrent 4.8 mA when a monochromatic radiation of wavelength 3000 Å and power of 1wM is incident. When another monochromatic radiation of wavelength 1650 Å and power 5wM is indcident, it is observed that maximum velocity of photoelectron increases to two times. Assuming efficiency of photoelectron generation per incident photon to be same for both the cases, calculate. (a) the threshold wavelength for the cell (b) the saturation current in second case (c ) the efficiency of photoelectron generation per incident photon.

A photocell is operating in saturation mode with a photocurrent 4.8 mA when a monochromatic radiation of wavelength 3000 Å and power of 1wM is incident. When another monochromatic radiation of wavelength 1650 Å and power 5wM is indcident, it is observed that maximum velocity of photoelectron increases to two times. Assuming efficiency of photoelectron generation per incident photon to be same for both the cases, calculate. (a) the threshold wavelength for the cell (b) the saturation current in second case (c ) the efficiency of photoelectron generation per incident photon.

A monochromatic light of wavelength lamda is incident on an isolated metallic sphere of radius a. The threshold wavelength is lamda_(0) , which is larger than lamda . Find the number of photoelectrons emitted before the emission of photo electrons stops.

The threshold wavelength of a metal is 400 nm photo electrons have kinetic energy maximum 1.5 eV. Find the wavelength of incident photon.