Question

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Laws of refraction​

Answer 1

QUESTION:-

Laws of refraction

ANSWER:-

When a beam of light passes through two different media via an interface, its behaviour is governed by the laws of refraction of light. These laws are also known as Snell’s law.

Two laws of refraction

The two laws followed by a beam of light traversing through two media are:

The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. This is also known as Snell’s law of refraction.

sin i / sin r = n whereby n is the refractive index of the denser medium.

ExamplesThe twinkling of stars is due to the refraction of light.Mirage and looming are optical illusions that are a result of the refraction of light.A swimming pool always looks shallower than it really is because the light coming from the bottom of the pool bends at the surface due to the refraction of light.

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Answer 2

Explanation:

The incident ray AB and the refracted ray BC and the perpendicular of B to the surface separating the two media Mo and M1 lie in the same plane.

State laws of refraction

The angle of incidence is the angle between the incident ray and the normal, denoted as ‘i’. The angle of refraction is the angle between the refracted ray and the normal, denoted as ‘r’. Laws of refraction state that:

The incident ray, reflected ray and the normal, to the interface of any two given mediums, all lie in the same plane.

The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant. This is also known as Snell’s law of refraction