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Blue light can cause photoelectric emission from a metal, but yellow light cannot. If red light is incident on the metal, then

$\begin {array} {1 1} (a)\;Photoelectric\: current\: wd)\;Energy \: of \: the \: photoelectrons \: will \: increase \end {array}$

 

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Ans : (c) No photoelectric emission will occur
Since, threshold wavelength of red light is less than that of yellow light.
So, it will not cause photoelectric emission.

 

answered Dec 24, 2013 by thanvigandhi_1
edited Oct 12, 2014 by thagee.vedartham
 

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