First slide

Photo Electric Effect

Question

When yellow light is incident on a surface, no electrons are emitted while green light can emit. If red light is incident on the surface, then

Easy

A

No electrons are emitted
B

Photons are emitted
C

Electrons of higher energy are emitted
D

Electrons of lower energy are emitted

Solution

$λ_{r} > λ_{y} > λ_{g .} Here threshold wavelength < λ_{o}$

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