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When light wave suffers reflection at the interface from air to glass, what is the change in the phase of reflected wave?
When light is reflected off a more dense medium with higher index of refraction, crests get reflected as troughs and troughs get reflected as crests. The wave is said undergo a 1800 change of phase on reflection. The net effect of the phase change is that the reflected ray ``jumps ahead" by half a wave length.
the is a phase shift of pi radians when light reflects from glass which was initially travelling in air.
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