Foundation
Physics Foundation
refraction from lens
Question
A ray of light passes through a glass slab of refractive index (µ). The angle between the incident ray and emergent ray is :
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Solution
When a light ray passes through a parallel-sided glass slab, it undergoes refraction twice but emerges parallel to the incident ray. The lateral displacement does not affect the direction. Therefore, the angle between the original incident ray and the final emergent ray is zero.
The emergent ray is parallel to the incident ray: and .
Final Answer: 0°