Identify the correct statements.
(A) The energy (E) and momentum (p) of a photon are related by p = E/c.
(B) The electrons and photons of the same wavelength, possess the same momentum.
(C) One photon having energy more than work function can emit one photo electron.
(D) Photons do not carry momentum.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A), (B) and (C) only
(A) Correct. For a photon, momentum and energy are related as p = E/c.
(B) Correct. Momentum p = h/λ. Hence, any particle (electron or photon) with the same wavelength has the same momentum.
(C) Correct. In photoelectric effect, one photon of energy greater than the work function can emit one photoelectron.
(D) Incorrect. Photons do carry momentum p = h/λ.