Photons of energy 7 eV are incident on t...

Photons of energy 7 eV are incident on two metals A and B with work functions 6 eV and 3 eV respectively. The minimum de Broglie wavelengths of the emitted photoelectrons with maximum energies are `lambda_A` and `lambda_B`, respectively where `lambda_A // lambda_B` is nearly

A

`0.5`

B

`1.4`

C

`4.0`

D

`2.0`

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The correct Answer is:

D

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