JEE Main & Advanced
Physics
Wave Optics / तरंग प्रकाशिकी
Question Bank
Self Evaluation Test - Wave Optics
question_answer
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 :