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Question
From a metal surface photoelectrons cannot be emitted using green light. Which of the following radiations can emit same photoelectron?
From a metal surface photoelectrons cannot be emitted using green light. Which of the following radiations can emit same photoelectron?
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Solution
The correct option is B Blue
Increasing order of wavelengths :
Violet < Indigo < Blue < Green < Yellow < Orange < Red
As the wavelength increases, the energy decreases. Therefore we need a radiation with wavelength less than green. So, only blue light can emit photoelectrons from the given metal surface.
Increasing order of wavelengths :
Violet < Indigo < Blue < Green < Yellow < Orange < Red
As the wavelength increases, the energy decreases. Therefore we need a radiation with wavelength less than green. So, only blue light can emit photoelectrons from the given metal surface.
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