why does the emergent ray emerges parallel to the direction of incident ray?
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the angle to the normal decreases with increase in refractive index when a ray incidents the angle decreases but on emergence the refractive index decreases with respect to the denser medium so the angle again increase so the incidence angle and emergent angle become same but due to refraction the position of the line change so the ray is parallel to incident ray
HimanshiKankane:
ohkk that is why they are parallel
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Answer:
hi
the angle to the normal decreases with increase in refractive index when a ray incidents the angle decreases but on emergence the refractive index decreases with respect to the denser medium so the angle again increase so the incidence angle and emergent angle become same but due to refraction the position of the line change so the ray is parallel to incident ray
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