A ray of light in passing from a transparent medium $1$ to another transparent medium $2$ slows down. In this case, state whether the refractive index of medium $2$ is $-$ the refractive index of medium $1$ .

greater than

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equal to

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less than

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none of these.

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Solution

The correct option is A greater than
According to Snell's Law: $\frac{s i n θ_{1}}{s i n θ_{2}}$ = $\frac{v_{1}}{v_{2}}$ = $\frac{n_{2}}{n_{1}}$
This means $n_{1} v_{1} = n_{2} v_{2}$
If speed of light travelling from from medium 1 to 2 decreases, then refractive index of medium 2 is more than that of medium 1.

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A ray of light in passing from a transparent medium 1 to another transparent medium 2 slows down. In this case, state whether the refractive index of medium 2 is – the refractive index of medium 1.

The correct option is A greater thanAccording to Snell's Law: sinθ1sinθ2=v1v2=n2n1This means n1v1=n2v2If speed of light travelling from from medium 1 to 2 decreases, then refractive index of medium 2 is more than that of medium 1.

A ray of light in passing from a transparent medium $1$ to another transparent medium $2$ slows down. In this case, state whether the refractive index of medium $2$ is $-$ the refractive index of medium $1$ .