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Consider a ray propagating in the medium with the index of refraction n=n(x) (i.e.,n does not...

Consider a ray propagating in the medium with the index of refraction n=n(x) (i.e.,n does not depend on y,z). Show using the Eikonal equations that nsin(?) is a constant along the ray’s path, where ? is the angle between the ray’s propagation and the x axis.

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ekional equation suggests that in homogenous medium light travel in straight line we have to conisider ray trajectory to be constant

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