IIT JEE , AIEEE Forum - Physics , Optics

001sri

one thing i left in my last post was the construction aspect.

now since these wavelets r spherical so they will superimpose n interfere constructively n destructively.these newly formed waves can b thought of as moving in such a way which give us a feeling that a large envelope is spreading in forward direction(directionof propagation) considering large no.of wave fronts included in the envelope.
u can imagine it just like ripples in water considering each "circle" as an envelope which is made up oftiny wavelets.

now come to the construction point of view.
when we draw a wave front we consider it so large that it becomes same(almost)the tangent at the surface of wave front
and this the straight line which u see in books for refraction or reflection.

hope nothing is left now.

everybody let me know their opinion as
it is quite conceptual part of JEE syllabus

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