What type of wave front will emerge from a distant light source? Use Huygens’ principle to
verify the laws of refraction
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plane wavefront
(i) From a point source, the wavefront is diverging spherical wavefront. (ii) From a distant light source, the wavefront is plane wavefront
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According to Huygens principle A'B' is the new position of wavefront AB in the second medium. Hence A'B' will be the refracted wavefront. First law: As AB, A'B' and surface XY are in the plane of paper, therefore the perpendicular drawn on them will be in the same plane.
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