For photon, momentum p = E/c =
Ah × ν / c = h/λ
Bh × c
CE × c
Dm c²
Answer & Solution
Correct answer: A. h × ν / c = h/λ
For massless particle: E = pc. So p = E/c = hν/c = h/λ. Used in radiation pressure calculations and Compton scattering.
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