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Why theres a phase reversal when wave reflects from denser surface but no phase reversal when it reflects from rarer surface?

Why theres a phase reversal when wave reflects from denser surface but no phase reversal when it reflects from rarer surface?

Grade:9

1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
Hello Student,
If a wave reflects from an optically more dense medium than the one in which it was travelling (e.g when going from air to glass) then a phase change of π is produced, corresponding to an effective path difference of half a wavelength.
But no such things happens in case of a wave reflects from an optically less dense medium.

Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty

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