CUET · PHYSICS · PYQ PAPER 2025
If an electron and a photon have energy, then,
(A) Electrons and photons both have wavelengths
(B) Electron and photon both have momentum
(C) Both electron and photon do not have momenta
(D) The electron has energy and momentum and the photon has energy only
Choose the correct answer from the options given below:
- A (A) and (C) only
- B (A) and (B) only
- C (B) and (C) only
- D (A) and (D) only
Answer & Solution
Correct Answer
(B) (A) and (B) only
Step-by-step Solution
Detailed explanation
Electron wavelength: \( \lambda = h/p \) Photon wavelength: \( \lambda = hc/E \) Electron momentum: \( p = mv \) Photon momentum: \( p = E/c \) The correct option is "(A) and (B) only".
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