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Laws of Refraction

Which of the ...

Question

Which of the following comes under laws of refraction?

A

Angle of incidence is equal to angle refraction

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B

Angle of refraction is greater than angle of incidence

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C

Value of

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

is known as refractive index of the medium

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D

All

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Solution

The correct option is C Value of $\frac{s i n i}{s i n r}$ is known as refractive index of the medium
The laws of refraction are as follows:
1. According to the first law of refraction, the incident ray, the refracted ray and the normal to the point of incidence, all lie in the same plane.
2. According to the second law of refraction, also, known as the Snell's law, the ratio of sine of the angle of incidence to the sine of angle of refraction is a constant for a given pair of media.
$\Rightarrow \frac{S i n i}{S i n r} = C o n s t a n t$

This constant is known as the refractive index.
Hence, the correct answer is option C.

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Similar questions

Q. A ray of light travels from a medium of refractive index

n_{1}

to a medium of refractive index

n_{2}

. If angle of incidence is i and angle of refraction is r, then

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

is equal to _______.

Q. Statement 1: Angle of incidence is greater than the angle of refraction.
Statement 2: Angle of incidence is lesser than the angle of refraction.
Statement 3: Angle of emergence is equal to the angle of incidence.
Which of the following is/are correct with respect to refraction in a glass slab?

Q. In the experiment to trace the path of a ray of light through a parallel sided glass slab, a student measured the angles of refraction for three different angles of incidence. He will find that:
(1) angle of refraction is always equal to the angle of incidence
(2) angle of refraction is always smaller than the angle of incidence
(3) angle of refraction is always greater than the angle of incidence
(4) angle of refraction can be smaller or greater than the angle of incidence depending on the refractive index of glass slab

Q. The refractive index of air with respect to glass is expressed as

_{g} μ_{a} = \frac{sin r}{sin i}

r = 90^{o}

, what is the corresponding angle

i

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
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