In the context of the Photoelectric effect, identify the statements which support quantum nature of light.

(A) The electric charge of photoelectrons is quantized
(B) The maximum kinetic energy of photoelectrons depends on the frequency of the incident light, but is independent of its intensity
(C) The photoelectric emission is an instantaneous process without any apparent time lag, even when the incident radiation is made exceedingly dim
(D) There is a minimum frequency of light below which no photoelectrons are emitted

Choose the correct answer from the options given below:

(B), (C) and (D) only

The correct answer is Option (3) → (B), (C) and (D) only

In the photoelectric effect, the following observations support the quantum nature of light:

(A) False — Quantization of photoelectron charge is due to quantization of electric charge, not quantum nature of light.

(B) True — The dependence of photoelectron energy on frequency shows that light energy is delivered in discrete quanta (photons).

(C) True — Instantaneous emission indicates energy transfer by single photons, not by gradual accumulation.

(D) True — Existence of a threshold frequency confirms that photons must have a minimum energy $h\nu_0$ to eject electrons.

Correct statements: (B), (C), and (D)