Question

the refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. if the speed of light in glass is 2*10^8, find the speed of light in water

Answer 1

Answer:

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Step by step solution:

$Given \ n_{g}=\frac{3}{2} \ and \ n_{w}=\frac{4}{3}\\ \\also \ given \ speed \ of \ light \ in \ glass \ 2 \times10^{8}\\\\we \ have \ to \ find \ speed \ of \ light \ in \ water\\\\Let \ us \ do\\\\we \ know \ formula\\\\n_{g} \times v_{g} =n_{w} \times v_{w}\\\\putting \ value \ here\\\\\frac{3}{2} \times 2 \times10^8=\frac{4}{3}\times v_{w}\\\\ v_{w}=\frac{9}{4} \times 10^8 \ m/sec\\ \\ v_{w}=2.25 \times 10^8 \ m/sec$

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Answer 2

Explanation:

refer to the attachment