1.

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       [MNR 1998; MP PET 2000; MH CET 2000]

A.            No electrons are emitted
B.            Photons are emitted
C.            Electrons of higher energy are emitted
D.            Electrons of lower energy are emitted
Answer» B.            Photons are emitted


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