Chemistry - Atomic Structure Question with Solution | TestHub

An electron breaks free from a metal surface when it absorbs enough energy from light of any wavelength.

In dim light there will be a time lag before photocurrent flows, because the electrons have to absorb enough energy to break free.

As the intensity of radiation increases more electrons will be ejected from the metal surface, above threshold frequency

Photoelectric effect is caused only by radiations of specific wavelength; any radiations of lesser or higher wavelength cannot result in photoelectric effect on a particular metal surface.