Optics 2 Question 11
11. A ray of light passes through four transparent media with refractive indices and as shown in the figure. The surfaces of all media are parallel. If the emergent ray is parallel to the incident ray , we must have
(2001, 2M)
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 11. (d)
Solution:
- Applying Snell’s law at
and , constant or
But
or
NOTE
The Snell’s law, which the
students read in their plus two syllabus
Here :