When a photon enters glass from air, which one of the following quantity does $\underline{\text { NOT }}$…

When a photon enters glass from air, which one of the following quantity does $\underline{\text { NOT }}$ change?
  1. Velocity
  2. Energy
  3. Momentum
  4. Wavelength

Solution

When a photon enters glass from the air, its energy does not change, but its wavelength and velocity do, and thus its momentum (mv) does.

Asked in: MHT CET 2020 (16 Oct Shift 1)

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