Question

the refractive index of air increases with a) speed of air b) hotness of air c) humidity in air d) density ​

Answer 1

On a hot summer night, the refractive index of air is smallest near the ground and increase with height from the ground. When a light beam is directed horizontally, the Huygen's principle leads us to conclude that as it travels, the light beam....

and the answer is density frd...

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