When a photon enters glass from air, which one of the following quantity does not change? (a) Energy (b) Velocity (c) Wavelength (d) Momentum

Answer: (a). Photon energy E = hν depends only on frequency. Frequency is set by the source and does not change on refraction; speed, wavelength and momentum h/λ change. So the answer is (a) Energy.

When a photon enters glass from air, which one of the following… | MHT CET 2021 (22 Sep, Shift 2)

Q23MHT CET 2021 · 22 SEP · SHIFT 2Easy

Photons: Energy, Momentum & Radiation Pressure

When a photon enters glass from air, which one of the following quantity does not change?

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Answer: (a)

Photon energy $E = h\nu$ depends only on frequency.
Frequency is set by the source and does not change on refraction; speed, wavelength and momentum $h/\lambda$ change.
So the answer is (a) Energy.

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Photons: Energy, Momentum & Radiation Pressure question from MHT CET 2021 (22 Sep, Shift 2)

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