The wave front is a surface in which
- all points are in the same phase
- there are pairs of points in opposite phase
- there are pairs of points with phase difference
- 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.
Asked in: AP EAMCET 2021 (20 Aug Shift 2)