Question
A glass optical fiber $(n=1.50)$ is submerged in water $(n=$ 1.33). What is the critical angle for light to stay inside the fiber?
Step 1
The critical angle is the angle of incidence at which light is refracted at an angle of 90 degrees with respect to the normal. In other words, it is the angle at which the refracted ray just grazes the boundary between two media. Show more…
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