Question

The threshold energy is given as E0 and radiation of energy E falls on metal then K.E is given as

Answer 1

The equation for this phenomenon is KE=hv-hv0 where KE is the kinetic energy of the emitted electron, h=6063*10^-34 is Planck's constant, is the frequency of the light, and is the threshold frequency of the metal. Also, E=hv since , the equation can also be written as KE=E-E 0 where E is the energy of the light and E0 is the threshold energy of the metal.

Answer 2

we have a formula that

E0= threshold energy+ KE

so KE=E0-threshold enegy

hope it helps u dear