what is the difference between incident ray and emergence ray?
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p☆☆When light is allowed to pass through a glass slab, the lightthat strikes the glass slab is called an incident ray.☆☆☆☆☆☆ ... Thisray of light which passes from the denser medium to the rarer medium is called theemergent ray.●●●●●
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Since the refracting surfaces are parallel to each othe the emergent rays are parallel.
The angle of incidence on the first surface { from air to glass} be i and the angle of refraction at the first surface be r.
Since the surfaces are parallel the ray inside the glass falls at the other surface at angle r and therefore the ray emerges at angle i that is the angle of incidence.
Therefore the incident ray is parallel to the emergent ray.
Since the refracting surfaces are parallel to each othe the emergent rays are parallel.
The angle of incidence on the first surface { from air to glass} be i and the angle of refraction at the first surface be r.
Since the surfaces are parallel the ray inside the glass falls at the other surface at angle r and therefore the ray emerges at angle i that is the angle of incidence.
Therefore the incident ray is parallel to the emergent ray.
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