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Q)

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

$\begin {array} {1 1} (a)\;10^{-4}s & \quad (b)\;10^{-10}s \\ (c)\;10^{-16}s & \quad (d)\;10^{-1}s \end {array}$

Ans : (b) $10^{-10}s$
$10^{-10}s.$