JEE Main 2015 Physics question
On a hot summer night, the refractive index of air is the smallest near the ground and increases with a 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,
Answer: (1)
Solution
By Huygens' construction the wavefront turns towards the region of higher refractive index, because light travels faster where μ is smaller. Here
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