1.

When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to [CPMT 1991; J & KCET 2004]

A.            0    
B.            \[\frac{\pi }{2}\]
C.            \[\pi \]                                    
D.            \[2\pi \]
Answer» D.            \[2\pi \]


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