Q146 / 160 · AP EAMCET 2021 (20 Aug Shift 2) · Physics

The wave front is a surface in which

  • Correct answer
    A
    all points are in the same phase
  • B
    there are pairs of points in opposite phase
  • C
    there are pairs of points with phase difference (π/2)
  • D
    there is no relation between the phases

Solution

A wave front is a surface over which an optical wave has a constant phase (i.e. there is no phase difference).
Or such a surface which envelopes the particles that are in the same state of vibration is known as a wave front.
The wave front at any instant is defined as the locus of all the particles of the medium which are in the same state of vibration.

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

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