The thresthold frequencey for photoelecric emission of electrons from platinum is `1.3xx10^(15)s^(-1)`. Which of the following statements is not correct?

Options

A. the number of electrons ejected from the metal surface will depend upon the the intensity of radiation having frequency `le1.3xx10^(15)s^(-1)`.
B. The radiation having energy `1xx10^(-20)J` will be able to cause photoelectric efect.
C. If radiation having frequency `1.3xx10^(14)s^(-1)` strikes the platinum suface, photo-electrons will not be ejected.
D. The kinetic energy of the emitted electrons will increasse with increase in frequency provided it is greater than `1.3xx10^(15)s^(-1)`.

Answer

A

Explanation

Threshold frequency `v_(0)=1.3xx10^(15)s^(-1)` and threshold energy
`hv_(0)=6.6xx10^(-34)xx1.3xx10^(15)`
`=858xx10^(-19)J`
Therefore option b , c and d are correct. Option A is not correct.