When we sit at a camp fire, objects beyond the fire are seen swaying. The principle involved in it is
- refraction
- reflection
- total internal reflection
- scattering
The Correct Option is A
Solution and Explanation
The air above a fire is hotter and less dense compared to the surrounding cooler air. This causes the light rays coming from objects behind the fire to bend as they pass through air layers of different densities. This bending of light is called refraction, and it makes the objects appear to sway or shimmer. So, the swaying appearance of objects is due to the refraction of light.
The correct answer is option (A) : refraction
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At very high altitudes, passengers are above the atmosphere where there is less scattering of sunlight. As a result, they do not see the scattered blue light and the sky appears dark, similar to the condition experienced by astronauts in space.
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