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Question
Three different arrangements of media are given through which a light ray is being passed. It is given that total internal reflection does not happen at any interface and that the light leaves from the opposite interface. In which of the following situations, the emergent ray would be parallel to the incident ray?
Three different arrangements of media are given through which a light ray is being passed. It is given that total internal reflection does not happen at any interface and that the light leaves from the opposite interface. In which of the following situations, the emergent ray would be parallel to the incident ray?
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Solution
The correct options are
A
B
C
The emergent ray is parallel to the incident ray for a rectangular slab or a combination of parallel rectangular slabs. The medium of the slabs do not matter for this to happen.
For a prism, the emergent ray will not be parallel to the incident ray and there will be a finite angle between them.
A
B
C
The emergent ray is parallel to the incident ray for a rectangular slab or a combination of parallel rectangular slabs. The medium of the slabs do not matter for this to happen.
For a prism, the emergent ray will not be parallel to the incident ray and there will be a finite angle between them.
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