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

If the threshold wavelength (lambda_(0)) for spection of electron from metal is 350nm then work function for the photoelectric emission is

A light beam of wavelength lambda incident on a silver sphere of radius r. suspended by a nonconducting thread. Find potentical aquired by sphere

A ray of light of wavelength lambda is incident on mirror at an angle of incidence 60^(@) . The wavelength of light after reflection will be

If threshold wavelength (lambda_(0)) for ejection of electron from metal is 330 nm, then work function for the photoelectron emission is

If the threshold wavelength (lambda_(0)) for ejection of electron from metal is 330 nm, then work function for the photoelectric emission is:

Stopping potential of emitted photo electron is V when monochromatic light of wavelength 'lamda' incident on a metal surface. If wavelength of light incident becomes 'lambda/3' stopping potential of photoelectrons becomes V/4 then the threshold wavelength of metal is k'lambda' then k will be

When monochromatic light of wavelength lambda is incident on a metallic surface the stopping potential for photoelectric current is 3V_(0) when same surface is illuminated with light of waelength 2lambda the stopping potential is V_(0) The threshold wavelength for this surface when photoelectric effect takes place is

When a piece of metal is illuminated by monochromatic light of wavelength lambda, then stopping potential is 3V_(s) . When the same surface is illuminated by the light of wavelength 2lambda , then stopping potential becomes V_(s) . The value of threshold wavelength for photoelectric emission will be