For most metals threshold frequencies lie in which region?

For most of metals threshold frequency lies in which region of electro-magnetic radiation?

For alkali metals threshold frequencies lie in which region?

Define threshold frequency.

Value of threshold frequency depend on which factors?

For given metal plate threshold frequency is V_(0) . When radiation of 2V_(0) is incident on metal surface ,maximum velocity of photoelectron emitted is V_(1) when frequency of incident radiation is charged to 5V_(0) ,maximum velocity of photoelectron emitted is v_(2) .Ration of v_(1) and v_(2) is .....

If ratio of threshold frequencies of two metals is 1:3 ,ratio of their work function is ……

A monochromatic light of frequency f is incident on two identical metal spheres of threshold frequency f/2 and f/3 respectively. After some time, emission of photoelectron will stop on both spheres . Now both metal spheres are connected through wire. (radius of spherhes is R ) (a)What will be potential of spheres now ? (b)how many electron will flow through wire ?

This question has statement - 1 and statement - 2 of the four choice given after the statements choose the one that best describes the two statements statement - 1 : A metallic surface is irradiated by a monochromatic light of frequency v gt v_(0) (the threshold frequency). The maximum kinetic energy and the stopping potential are K_(max) and V_(0) respectively if the frequency incident on the surface is doubled , both the K_(max) and V_(0) are also doubled statement - 2 : The maximum kinetic energy and the stopping potential of photoelectron emitted from a surface are linearly dependent on the frequency of incident light

Energy corresponding to threshold frequency of metal is 6.2 eV.For given radiation stopping potential is 5 V then incident radiation will be in …region.