Question

What is time lag? How it is helpful

Answer 1

time lag is the interval of time between 2 closely related events phenomena etc

Answer 2

$\colorbox{orchid}{ANSWER}$

What is time lag? How it is helpful

➡photoelectric emissions is the result of an elastic collision between a photon and an electron. thus the absorption of energy from a photon by a free electron inside the metal is a single event which involves transfer of energy in one lump instead of the continuous absorption of energy as in the wave theory of light. hence there is no time lag b/w the incidence of photon and the emission of a photo electron.

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