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:

P is optically denser than Q

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Q is optically denser than P

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P and Q have same optical density

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P and Q are opaque.

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Solution

The correct option is A
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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Q. A Ray of light is incident in medium one on a surface that separates medium one from medium to let V1 and V2 represent the velocity of light in medium one and medium to respective also let n12 and n21 respect the refractive index of medium one with respect to medium 2 and refractive index of medium two with respect to medium 1 respectively. if i and r denote the angles of incidence and refraction then
a)sin i/sin r=n12=v2/v1
b)sin i/sin r=n21=v2/v1
c)sin i/sin r=n12=v1/v2
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It is given that the value of (sin i / sin r) when light enters from medium P to medium Q is less than 1.

Q. The ratio

\frac{s i n i}{s i n r}

where

∠ i

and

∠ r

are the angles of incidence and refraction respectively is called the _________ of the second medium (B) with respect to the first medium (A).

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

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: