NDA 2021 Physics question

Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave ?

(A)Speed
(B)Direction
(C)Brightness
(D)FrequencyCorrect

Answer: (D)

Solution

The frequency of a wave is fixed by its source and does not change on refraction. The speed and

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Question ID VK-031783