On a hot summer night, the refractive index of air is smallest near th – McqOptions

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1.	On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam :
A.	bends downwards
B.	bends upwards
C.	becomes narrower
D.	goes horizontally without any deflection
Answer» C. becomes narrower

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