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Physics · 2015
JEE Main 2015 · 2015-04-04 Offline · Q25
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…
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 :
Official answer
(4)
bends upwards
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