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| Q. |
The phenomenon which causes mirage is – |
| A. | Interference |
| B. | Diffraction |
| C. | Polarisation |
| D. | Total internal reflection |
| Answer» D. Total internal reflection | |
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Explanation: Mirage is caused by total internal reflection in deserts where due to heating of the earth, refractive index of air near the surface of earth becomes lesser than above it. A ray of light coming from a distant object gets refracted from a denser to a rarer medium. |
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