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Q.

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

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a

no electrons are emitted

b

photons are emitted

c

electrons of higher energy are emitted

d

electrons of lower energy are emitted

answer is A.

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Detailed Solution

we know that λr>λy>λgThe wavelength of red light is greater than threshold wavelength and hence no elections are emitted
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