A) \[2\times {{10}^{-2}}\]
B) \[\sqrt{3}\]
C) \[\frac{W}{3}\]
D) \[\frac{W}{\sqrt{3}}\]
Correct Answer: B
Solution :
The photoelectric effect is an instantaneous phenomenon (experimentally proved). It takes approximate, time of the order of \[\frac{{{n}_{1}}}{{{n}_{2}}}=\frac{{{l}_{2}}}{{{l}_{1}}}=\frac{49}{50}\].
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