What happens to the direction of the incident ray when it travels from (a) optically denser medium to rarer medium & (b) optically rarer medium to denser medium?
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What happens to the direction of the incident ray when it travels from (a) optically denser medium to rarer medium & (b) optically rarer medium to denser medium?
What happens to the direction of the incident ray when it travels from (a) optically denser medium to rarer medium & (b) optically rarer medium to denser medium?
(a) It bends away from the normal
(b) It bends towards the normal