NEET Physics Huygens Principle MCQ Question
Consider a diagram where a spherical wavefront is propagating from a point source in a uniform medium. Spheres of radius vt are drawn from each point on the wavefront. What does the common tangent to these spheres represent?
The new position of the wavefront at time t.
The backward direction of the wave propagation.
The direction of maximum amplitude of secondary wavelets.
The refracted wavefront in a second medium.
Correct Answer
Detailed Explanation
According to Huygens Principle, the common tangent to the spheres represents the new position of the wavefront as it propagates, moving outward with speed v.
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