A light ray passes from air into another medium at point P . How long does it take the light ray to travel from P to Q ?

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​ sin θ = 13 5 ​ ​ μ sin θ = ( 1 ) sin 5 3 ∘ ​ ​ ⇒ μ ( 13 5 ​ ) = 5 4 ​ ⇒ μ = 25 52 ​ v m ​ = μ c ​ = 52/25 3 × 1 0 8 ​ Time taken = 3 × 1 0 8 13 × ( 52/25 ) ​ = 9 × 1 0 − 8 s

Physics - Geometrical Optics Question with Solution | TestHub

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