13. When a metal is irradiated with light offrequency 4.0 x1016- the p – InterviewSolution

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1.	13. When a metal is irradiated with light offrequency 4.0 x1016- the photo electronsemitted had six times the K.E as the K.E ofphoto electron emitted when the metal wasirradiated with light of frequency 2.0 x 1015".Calculate the critical frequency of the metal.1) 2.0 x1016-1 2)1.6x10s-13) 3.0 x106,- 414.2x106-1
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