The threshold wavelength for photoelectric em | vedclass

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(d) In this case, for photoelectric emission the wavelength of incident radiations must be less then $5200{ \mathring A}$. Wavelength of ultraviolet r

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Both $(b)$ and $(c)$

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(d) In this case, for photoelectric emission the wavelength of incident radiations must be less then $5200{ \mathring A}$. Wavelength of ultraviolet radiations is less then this value $(5200 \, \mathring A)$ but wavelength of infrared radiations is higher than this value.

The threshold wavelength for photoelectric emission from a material is $5200\, \mathring A$. Photo-electrons will be emitted when this material is illuminated with monochromatic radiation from a

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