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On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground.

Question:

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 :

  1. bends downwards

     

  2. bends upwards

     

  3. becomes narrower

     

  4. goes horizontally without any deflection


Correct Option: , 2

Solution:

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