A) \[\nu <\frac{\varphi }{h}\]
B) \[\nu =\frac{\varphi }{h}\]
C) \[\nu >\frac{\varphi }{h}\]
D) \[\nu >\ =\ <\frac{\varphi }{h}\]
Correct Answer: A
Solution :
For no emission of photoelectron, energy of incident light < Work function \[\Rightarrow \,\,h\nu <\varphi \,\,\,\Rightarrow \,\nu <\frac{\varphi }{h}\]
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