CUET · PHYSICS · PYQ PAPER 2025
The energy of a photon of wavelength (\( \lambda \)) is given by the expression: (Symbols have their usual meaning: h = Planck's constant, c = speed of light)
- A \( h \lambda c^{-1} \)
- B \( h \lambda^{-1} c^{-1} \)
- C \( h \lambda^{-1} c \)
- D \( h^{-1} \lambda c \)
Answer & Solution
Correct Answer
(C) \( h \lambda^{-1} c \)
Step-by-step Solution
Detailed explanation
\( E = h\nu \) \( \nu = \frac{c}{\lambda} \) \( E = \frac{hc}{\lambda} = hc\lambda^{-1} \)
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