MCQ
Solar cells are made of :
- AConductors.
- BInsulators.
- ✓Semi $-$ conductors.
- DSuper $-$ conductors.
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| S. No. | Angle of incidence | Angle of refraction | Angle of emergence |
| $I$ | $45^{0}$ | $41^{0}$ | $45^{0}$ |
| $II$ | $40^{0}$ | $38^{0}$ | $38^{0}$ |
| $III$ | $45^{0}$ | $41^{0}$ | $40^{0}$ |
| $IV$ | $41^{0}$ | $45^{0}$ | $41^{0}$ |