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Q. What will happen to spherical wavefronts, emanating from a point source after strike a plane reflecting surface?

NTA AbhyasNTA Abhyas 2020

Solution:

Solution
Above diagram represents the reflection of a spherical wavefront from a plane surface. From the diagram we can see that after reflection the wavefront still remains spherical but the centre of curvature of wavefront shifts from left side of plane mirror to right side of plane mirror.
Hence, the wavefront will remain spherical, with the same curvature, but sign of curvature reversed