A surface of constant phase in a wave is called a:
ARay path
BEnvelope
CWavefront
DWavelet
Answer & Solution
Correct answer: C. Wavefront
1. Points at the same distance from a source oscillate together.
2. The locus of such points in phase forms a surface.
3. That surface is called a wavefront.
_Source: NCERT Class 12 Physics Part II, Chapter 10, Wave Optics._
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