Answered: O. 20:Time taken by the light to travel… | bartleby

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Q. 20 Time taken by the light to travel
through 5 cm of glass is same as that through
(x) cm of air. R.I. of glass is 1.5, then (x) is
(a)
7.5 cm
(b) 1.33 cm
(c)
9 cm
(d) 6 ст

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