Q92 / 270 · NDA 2021 (Phase 1) · General Ability

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
  • Correct answer
    D
    Frequency

Solution

Frequency is the one among the following given options which applies to the demand of the question. It is same for the incident wave and refracted wave.

Hence, the correct answer is option: 'D'.

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