A ray of light is incident at the glass-water interface at an angle i . If it finally emerges parallel to the surface of the water, then the value of μ g would be

Question

A ray of light is incident at the glass-water interface at an angle i . If it finally emerges parallel to the surface of the water, then the value of μ g would be, 4 3 sin i, 1 sin i, 4 3, 1

MARKS App · Accepted Answer

Applying, Snell's law μsin i = constant at 1 and 2 , we have μ 1 sin i 1 = μ 2 sin i 2 Here, μ 1 = μ glass , i 1 = i ∴ μ 2 = μ air = 1 and i 2 = 90 ° ∴ μ g sin i = 1 × sin 90 ° ∴ μ g = 1 sin i

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