First slide

Matter waves (DC Broglie waves)

Question

When yellow light is incident on a surface no electrons are emitted while green light can emit. ff 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

we know that $λ_{r} > λ_{y} > λ_{g}$
The wavelength of red light is greater than threshold wavelength and hence no elections are emitted

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