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The speed of light in dense flint glass is 3/5 of its speed in air. The refractive index of dense flint glass is
A. 1.5
B. 1.75
C. 1.666
D. 1.1

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1 Answers

Correct Answer - C
`n=(V_(a))/(V_(d))=(V_(a))/( 3//5 V_a)=(5)/(3)=1.666`

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