my teacher said that during refraction by a glass slab, the light bends because in glass its speed is reduced and so as to take the normal time, it tends to cover shorter distance and thus bends by certain angle...... but in case of a prism, it goes towards the base of the prism however in this case its path is the longer one......please help me to solve this problem.....
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contd.... like in the diagram AB is the path of the refracted ray and AC is its usual undeviated path. here AB