Answers

2016-03-23T09:29:35+05:30
No they go parallel to each other. the emergent ray runs parallel to the extended incident ray
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2016-03-23T09:37:24+05:30
 NO,the incident ray and emergent ray does not coincide in a glass slab after refraction because in refraction,the incident ray is falling on the slab and the emergent ray will parallel to each other .
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