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# 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 CISCEÂ 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

### 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 asÂ 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 theÂ white lightÂ 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 starsâ€¦ which is caused due to the atmospheric refraction of light.

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

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