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  4. When light wave suffers reflection at the interface between air and glass, the change of phase of reflected wave is equal to

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Q. When light wave suffers reflection at the interface between air and glass, the change of phase of reflected wave is equal to

MHT CETMHT CET 2009Ray Optics and Optical Instruments

Solution:

The reflection of light wave is shown as
image
The change of phase of reflected wave is $180^{\circ}$.