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A wave travelling in air falls on a glass plate . It is partly reflected and partly refracted. What is the phase difference between the reflected and refracted waves ?A. `2pi`B. `pi`C. `(pi)/2`D. zero |
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Answer» Correct Answer - B The wave in air, incident on a glass plate is partly reflected and partly refracted. For the ray reflected at a denser medium there is a phase change of `pi`. But for refraction from air to glass, there is no phase change . `:.` There is a phase difference of `pi` between the reflected and refracted waves. |
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