Which of the following statements is/are INCORRECT?

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All spectral lines belonging to Balmer series in hydrogen spectrum lie in visible region.

If a light of frequency falls on a metal surface having work function $h v_{0}$ , photoelectric effect will take place only if $v \leq v_{0} .$

The number of photoelectrons ejected from a metal surface in photoelectric effect depends upon the frequency of incident radiations.

The series limit wavelength of Balmer series of H. atom is $\frac{4}{R},$ where R is Rydberg’s constant.

answer is A, B, C.

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Detailed Solution

A) Only first four spectral lines belonging to Balmer series in hydrogen spectrum lie in visible region.

B) If a light of frequency v falls on a metal surface having work function $h v_{0},$ photoelectric effect will take place only of $v \geq v_{0},$ since $v_{0}$ is the minimum frequency required for photoelectric effect.
C) The number of photoelectrons ejected from a metal surface in photoelectric effect depends upon the intensity of incident radiations