Nootan Solutions Refraction of Light at a Plane Interface ISC Class-12 Physics Nageen Prakashan

Nootan Solutions Refraction of Light at a Plane Interface Total Internal Reflection ISC Class-12 Physics Nageen Prakashan Chapter-15 Solved Numericals. Step by step Solutions of Kumar and Mittal ISC Physics Class-12 Nageen Prakashan Numericals Questions. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.

Nootan Solutions Refraction of Light at a Plane Interface ISC Class-12 Physics Nageen Prakashan

Class:	12
Subject:	Physics
Chapter 15:	Refraction of Light at a Plane Interface Total Internal Reflection

Board	ISC
Writer /Publications	Nootan / Nageen Prakashan/Kumar and Mittal
Topics	Solved Numericals Page 662

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Nootan Solutions Refraction of Light at a Plane Interface ISC Class-12 Physics Nageen Prakashan

Refraction:

Refraction is the bending of a wave when it passes from one medium to another. The bending is caused due to the differences in density between the two substances.

Refraction of Light :

This bending of light at the boundary when it passes from one medium to another is termed as refraction.
Refraction is due to change in the speed of light as it enters from one transparent medium to another.
Light does not travel in the same direction in all media .When a light ray passes obliquely from rarer medium (air) to a denser medium (water, glass) there is a change in its direction of propagation.

Causes of Refraction :

The cause of refraction of light is as follows:

The frequency of the refracted ray remains constant.
Due to partial reflection and absorption of light at the interface, the intensity of the refracted ray will be less than the incident ray.
When the light crosses the boundary between two different media, deviation of light occurs, resulting in refraction such that there is a change in wavelength and speed of light.

Effects of Refraction :

Twinkling of stars is due to refraction of light.
Mirage and looming are optical illusions which are a result of 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 refraction of light.

Applications of Refraction of Light :

Refraction has many applications in optics and technology. Depending on the type of spherical lens used (convex or concave) refraction through glass has many uses.

A lens uses refraction to form an image of an object for various purposes, such as magnification.
Passing white light through a glass prism can split the white light into the spectrum of colour (VIBGYOR).
In nature, it is refraction that causes us to see a different phenomenon like mirages and also the twinkling of stars… which is caused due to the atmospheric refraction of light.