MCQ
The phase difference between incident wave and reflected wave is 180° when light ray
- ✓Enters into glass from air
- BEnters into air from glass
- CEnters into glass from diamond
- DEnters into water from glass
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Statement $II$ : When such $P-$type and $N-$type semi-conductors, are fused to make a junction, a current will automatically flow which can be detected with an externally connected ammeter.
In the light of above statements, choose the most appropriate answer from the options given below.