Physicshard · Past Paper
Light of wavelength 6000 Angstroms in air enters a medium of refractive index 1.5. What is the wavelength in the medium?
A9000 A
B4000 A
C6000 A
D3000 A
✓ Correct Answer: B — 4000 A
Wavelength in medium = Wavelength in air / n = 6000 / 1.5 = 4000 Angstroms.
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