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Wave Optics question

2015 · Shift 0 · Q49
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Wave Optics question

2015 · Shift 0 · Q49

JEE MainPhysicsWave OpticsMCQ+4 / −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 :
  1. A
    bends down wards
  2. B
    bends upwards
  3. C
    becomes narrower
  4. D
    goes horizontally without any deflection
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