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Wave Optics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
Question
The phase difference between incident wave and reflected wave is 180° when light ray(a) Enters into glass from air(b) Enters into air from glass(c) Enters into glass from diamond(d)  Enters into water from glass
   
   
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Answer

(a) Enters into glass from air

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