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Light of frequency 1.5 times the threshold frequency, incident on a photo sensitive material. If the frequency of incident light is halved and the intensity is doubled the photo current becomes:

\[\begin {array} {1 1} (a)\;one-fourth & \quad  (b)\;doubled \\  (c)\;halved & \quad (d)\;zero \end {array}\]
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(d) zero
answered Nov 7, 2013 by pady_1

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