When light enters from medium P to medium Q- it is given that the value of sin i-sin r is less than 1- where i and r are the angle of incidence and refraction respectively- This means that-

Given: (sin i/sin r) lt; 1 ⇒ sin i lt; sin r ⇒ nbsp; Angle of incidence lt; Angle of refraction. It means that when light ray travels from medium P ...

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Standard X

Physics

Refraction

When light en...

Question

When light enters from medium P to medium Q, it is given that the value of $\frac{sin i}{sin r}$ is less than 1, where i and r are the angle of incidence and refraction respectively. This means that:

Q is optically denser than P

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P and Q are opaque.

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P is optically denser than Q

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P and Q have same optical density

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Solution

The correct option is C
P is optically denser than Q

Given: $(\frac{s i n i}{s i n r})$ < 1

$\Rightarrow$ sin i < sin r
$\Rightarrow$ Angle of incidence < Angle of refraction.

It means that when light ray travels from medium P to medium Q, the ray bends away from the normal.

We know that when light ray travels from denser to rarer medium, it bends away from the normal.

Hence, medium P is optically denser than Q.

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