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STD 12 - 11. Dual nature of radiation and matter — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 11. Dual nature of radiation and matter4 Marks
MCQ
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
  • ✓
    No electrons are emitted
  • B
    Photons are emitted
  • C
    Electrons of higher energy are emitted
  • D
    Electrons of lower energy are emitted
✓

Answer

Correct option: A.
No electrons are emitted
a
(a) ${\lambda _r} > {\lambda _y} > {\lambda _g}$. Here threshold wavelength $ < {\lambda _y}$.

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