What is the momentum of a photon of wavelength 663 nm (h = 6.63 × 10⁻³⁴ J s)?
Correct answer C. 1.0 × 10⁻²⁷ kg m/s
Explanation
Photon momentum depends only on wavelength: p = h/λ = 6.63 × 10⁻³⁴/(663 × 10⁻⁹) = 1.0 × 10⁻²⁷ kg m/s.
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