Question

derive the law of reflection using Hygen's wave theory.
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Answer 1

Answer:

Let AB be a plane wavefront of light incident obliquely on XY. When the incident wavefront touches XY at A, a secondary wavelet starts, spreading from A according to Huygens' principle. Let the ray at B reach XY at D after a time t. ... Hence CD is the reflected wavefront.

Answer 2

These incident wavefront is carrying two points, point A and point B, so we can say that from point B to point C light is travelling a distance. If ‘ v ‘ represents the speed of the wave in the medium and if ‘ r ‘ represents the time taken by the wavefront from the point B to C then the distance