The threshold wavelength of a metal is (` lambda_0). Light of wavelength slightly less than lambda_0 is incident on an insulated plate made of this metal. It is found that photoelectrons are emitted for sometimes and after that the emission stops. Explain.

Threshold wavelength of certain metal is lamda_0 A radiation of wavelength lamdaltlamda_0 is incident on the plate. Then, choose the correct statement from the following.

The work function of a certain metal is (hC)/lambda_(0) . When a monochromatic light of wavelength lambda lt lambda_(0) is incident such that the plate gains a total power P . If the efficiency of photoelectric emission is eta% and all the emitted photoelectrons are captured by a hollow conducting sphere of radius R already charged to potential V , then neglecting any interaction of potential of the sphere at time t is:

The work function of a certain metal is (hC)/lambda_(0) . When a monochromatic light of wavelength lambda lt lambda_(0) is incident such that the plate gains a total power P . If the efficiency of photoelectric emission is eta% and all the emitted photoelectrons are captured by a hollow conducting sphere of radius R already charged to potential V , then neglecting any interaction of potential of the sphere at time t is:

If lambda_(0) is the threshold wavelnegth of a metal and lambda is the wavelength of the incident radiation, the maximum velocity of the ejected electron from the metal would be

Light of wavelength 200 nm incident on a metal surface of threshold wavelength 400 nm kinetic energy of fastest photoelectron will be

Light of wavelength 3000Å is incident on a metal surface whose work function is 1 eV. The maximum velocity of emitted photoelectron will be

Light of wavelength A which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with same velocity, then stopping potential will

If light of wavelength 412.5 nm is incident on each of the metals given below, which one will show photoelectric emission and why? .

If light of wavelength 412.5 nm is incident on each of the metals given below, which one will show photoelectric emission and why ?

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 than lambda . Find the number of photoelectrons emitted before the emission of photoelectrons will stop.