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  4. 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

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Q. 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

Dual Nature of Radiation and Matter

Solution:

$\lambda_{r} > \lambda_{y} > \lambda_{g} .$ Here threshold wavelength $ < \lambda_{y}$