tane an The If index of refraction (n) is function of z in xyz coordinate, show that theta is the angle between z axis and the tangent direction of the light ray. dz n(z) dz

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de
tane dn
If index of refraction (n) is function of z in xyz coordinate, show that
The
n(z) dz
dz
theta is the angle between z axis and the tangent direction of the light ray.
Transcribed Image Text:de tane dn If index of refraction (n) is function of z in xyz coordinate, show that The n(z) dz dz theta is the angle between z axis and the tangent direction of the light ray.
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