33. Photons of energy 6 eV cause electrons to be emitted from a certain metal wi

Question

33. Photons of energy 6 eV cause electrons to be emitted from a certain metal with a maximum kinetic energy
of 2 eV. If photons of twice the wavelength are incident on this metal which one of the following
statements is true?
A) No electrons will be emitted.
B) Electrons will be emitted with a maximum kinetic energy of 1 eV.
C) Electrons will be emitted with a maximum kinetic energy of 8 eV.
D) Electrons will be emitted with a maximum kinetic energy of 10 eV.
E) Electrons will be emitted with a maximum kinetic energy of 20 eV.

Explanation / Answer

W0 =6-2 = 4eV

Now =hC/E

Since is doubled E will be half , 3 eV

So no electrons will be emitted

Ans is A

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