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Answer the following questions: (e) The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond cutter? |
| Answer» Solution :The refractive index of diamond 2.42 is MUCH more greater than the refractive index 1.5 of normal glass. Critical angle of diamond `(24^@)` is much more less than that of normal glass `(41^ @ 48.)` skilled diamond labours develop LARGE incidence series of `24^@` to `90^@`. Hence, the light enters into diamond will undergo TOTAL internal reflection from all surfaces before it emerges out. Hence, diamond gives the sparkling effect. | |