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A ray of light passes through for transp...

A ray of light passes through for transparent media with refractive index `n_1, n_2, n_3 and n_4` as shown in the figure. The surfaces of all media are parallel.

In the emergent ray DE is parallel to incidence ray AB, then

Text Solution

Verified by Experts

Applying snell.s law at B and C
`mu sin i`= constant or
`mu_1 sin i_B= mu_4 sin i_C`
But `AB||CD`
`therefore i_B=i_C or mu_1=mu_4`
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