Can by increasing intensity of incident radiation, velocity of emitted photoelectrons be increased? Explain. What will be then the effect of increasing intensity?
Can by increasing intensity of incident radiation, velocity of emitted photoelectrons be increased? Explain. What will be then the effect of increasing intensity?
Velocity of emitted photoelectrons depend upon their Kinetic energy as given by KE = ½ mv2 or v =√(2KE/m). But we know that KE of photoelectrons are independent of the intensity of incident light.
If intensity is increased photo current will increase, this means number of electrons ejected will increase. This increase in photo current will be directly proportional to the intensity of the incident light. But one thing has to be noticed that the incident light must be above the threshold frequency for the given material otherwise no photoelectrons will be emitted however strong be the intensity of the incident light.
Velocity of emitted photoelectrons depend upon their Kinetic energy as given by KE = ½ mv2 or v =√(2KE/m). But we know that KE of photoelectrons are independent of the intensity of incident light.
If intensity is increased photo current will increase, this means number of electrons ejected will increase. This increase in photo current will be directly proportional to the intensity of the incident light. But one thing has to be noticed that the incident light must be above the threshold frequency for the given material otherwise no photoelectrons will be emitted however strong be the intensity of the incident light.
