JEE MAIN - Physics (2006 - No. 18)
The time taken by a photoelectron to come out after the photon strikes is approximately
$${10^{ - 4}}\,s$$
$${10^{ - 10}}\,s$$
$${10^{ - 16}}\,s$$
$${10^{ - 1}}\,s$$
Explication
Emission of photo-electron starts from the surface
after incidence of photons in about $${10^{ - 10}}s.$$