Why emergent ray and incident ray are parallel to each other ? Explain.
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The emergent ray and incident ray parallel to each other because of refraction of light.
Nikhil1570:
is it right.
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Since the refracting surfaces are parallel to each other 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.
Hope this will help you ^_^
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.
Hope this will help you ^_^
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