Physicshard · Past Paper
Light travels from air into glass of RI 1.5. If the wavelength in air is 6000 Angstroms, what is the wavelength in glass?
A9000 A
B4000 A
C6000 A
D3000 A
✓ Correct Answer: B — 4000 A
λ_medium = λ_air / n = 6000 / 1.5 = 4000 Angstroms.
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