The maximum kinetic energy of the photoe...

The maximum kinetic energy of the photoelectrons ejected from a photocathode when it is irradiated with light of wavelength 440nm is 1eV. If the threshold energy of the surface is 1.9eV, then which of the following statement is/are incorrect?

A

The threshold frequency for photo sensitive metal is `4.6 xx 10^(14) Hz`

B

The minimum wavelength of incident light required for photoemission is 6513 Å

C

The maximum wavelength of incident light required for photoemission is 6513 Å

D

The energy of incident photon is 2.9 eV

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