NEET Physics Huygens Principle MCQ Question
Which combination of statements about Huygens' Principle is correct?
A wavefront is defined as a surface of constant phase; secondary wavelets propagate from all points on the wavefront.
The speed of the wavefront is independent of the medium; the amplitude of secondary wavelets is maximum in the backward direction.
Huygens' Principle can only explain the propagation of sound waves; the wavefront moves outward from the source uniformly.
Every point on the wavefront oscillates out of phase; the new wavefront is determined by drawing common tangents to secondary wavelets.
Correct Answer
Detailed Explanation
According to Huygens' Principle, a wavefront is indeed a surface of constant phase, and secondary wavelets do propagate from each point on the wavefront, confirming the correctness of option A. The other options contain misconceptions about the properties of wavefronts and the behavior of secondary wavelets.
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