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| Q. |
The sparkling of a diamond is due to – |
| A. | total internal reflection of light |
| B. | interference of light |
| C. | polarisation of light |
| D. | refraction of light |
| Answer» A. total internal reflection of light | |
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Explanation: Diamonds sparkle because of the total internal reflection of light. Diamonds have a very high refractive index, meaning they slow light down much more than glass; and if cut in the right manner, the angles of incidence can be made so that light seems to get 'trapped' within the diamond giving it it's sparkly appearance. |
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