Refraction Effects on Wavelength and Phase
A coherent light wave with a vacuum wavelength of 500 nm enters a thin film (n = 1.40) at normal incidence. Which statement describes the effect on the light’s wavelength and phase as it enters the film?
A
Wavelength and phase both change
B
Neither wavelength nor phase is affected
C
Wavelength shortens but phase remains continuous
D
Wavelength remains the same but phase shifts
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