McqMate
| Q. |
A mirage occurs because of – |
| A. | Reflection by hot ground |
| B. | Total internal reflection by layers of air |
| C. | Interference of light |
| D. | Diffraction of light |
| Answer» B. Total internal reflection by layers of air | |
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Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky. Mirages can be categorized as "inferior" (meaning lower), "superior" (meaning higher) and "Fata Morgana", one kind of superior mirage consisting of a series of unusually elaborate, vertically-stacked images, which form one rapidly-changing mirage. Cold air is denser than warm air and has therefore a greater refractive index. |
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