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  4. The time taken by a photoelectron to come out after the photon strikes is approximately

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Q. The time taken by a photoelectron to come out after the photon strikes is approximately

BVP MedicalBVP Medical 2007

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} $ .