Refraction of Light: Laws, Applications, and Example

Refraction of Light

Refraction of Light: Laws, Functions, and Example

Refraction of Light: Laws, Functions, and Example: Refraction is the bending of a wave when it passes from one medium to a different. The bending is prompted as a result of variations in density between the 2 substances. Refraction of sunshine is among the most noticed phenomena, however different waves like sound waves and water waves additionally expertise refraction. Refraction makes it attainable for us to have optical devices equivalent to magnifying glasses, lenses, and prisms. It is usually due to the refraction of light that we’re capable of focus light on our retina.

Refraction of light in water: When light travels from air into water, it slows down, inflicting it to vary path barely. This transformation of the path known as refraction. When light enters an extra dense substance (increased refractive index), it ‘bends’ extra in direction of the traditional line. The quantity of bending is determined by two issues: Change in pace, and Angle of the incident ray.

Laws of Refraction of Light

Laws of refraction state that:

  • The incident ray refracted ray, and the traditional to the interface of two media on the level of incidence all lie on the identical airplane.
  • The ratio of the sine of the angle of incidence to the sine of the angle of refraction is continuing. That is often known as Snell’s law of refraction.


Refraction has many functions in optics and expertise. A number of the outstanding functions are listed under:

  • A lens makes use of refraction to type a picture of an object for varied functions, equivalent to magnification.
  • Spectacles are worn by folks with faulty imaginative and prescient use the precept of refraction.
  • Refraction is utilized in peepholes of home doorways, cameras, film projectors, and telescopes.

An example of refraction of light.

An example of refraction is the rainbow. The light rays bend as they enter water drops within the environment forming a rainbow.

Snell’s law

Snell’s law could be derived from Fermat’s precept, which states that the light travels the trail which takes the least time. By taking the by-product of the optical path size, the stationary level is discovered giving the trail taken by the light.