Identify the basic features of the photon picture of electromagnetic radiation from the following.
(A) Each photon has energy $E= hv$ in vacuum.
(B) Photons are electrically neutral and are not deflected by electric and magnetic fields.
(C) All photons of light of a particular frequency $v$ or wavelength $λ$ have the same energy and momentum.
(D) If the intensity of light of a given wavelength is increased, there is an increase in the number of photons incident on a given area in a given time.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B), (C) and (D)
Photon picture features:
(A) True — Each photon has energy $E=h\nu$ in vacuum.
(B) True — Photons are electrically neutral and not deflected by electric or magnetic fields.
(C) True — All photons of the same frequency $\nu$ (or wavelength $\lambda$) have identical energy and momentum.
(D) True — Increasing intensity at a fixed wavelength increases the number of photons, not their energy.