A prism of angle has its face silvered. A ray of light incident at an angle of at the face retraces its path after refraction at face and reflection at face . The refractive index of the material of the prism is |
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b) |
c) |
d) |
A prism of angle has its face silvered. A ray of light incident at an angle of at the face retraces its path after refraction at face and reflection at face . The refractive index of the material of the prism is |
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a) |
b) |
c) |
d) |