Drop a stone in a calm pool. The ring of points all oscillating in phase is a:
ANodal line
BBright fringe
CWavefront
DLight ray
Answer & Solution
Correct answer: C. Wavefront
1. Points on one ring are equally far from the impact.
2. They rise and fall together.
3. Such a surface of constant phase is a wavefront.
_Source: NCERT Class 12 Physics Part II, Chapter 10, Wave Optics._
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