Draw reflected wavefront when a plane wavefront is incident on concave mirror, convex mirror, concave lens and convex lens.

Wavefronts are drawn by drawing arcs taking focus as centre such that the rays are always perpendicular to the surface of wavefronts.

This one is for concave and convex mirror respectively.

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.This one for convex and concave lenses.

This is an animated one for convex lens

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