The energy, \( E \), of a photon can be expressed as \( E = hf \) where \( f \) is the frequency and \( h \) is Planck's constant. The dimensions of \( h \) are the same as that of

  1. A. linear momentum
  2. B. angular momentum
  3. C. displacement
  4. D. torque

Correct Answer: B. angular momentum

Explanation

Planck's constant has the dimensions of \( [ML^2T^{-1}] \), which are the same as the dimensions for angular momentum.

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