Give two applications of refraction of light
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Glass slab, water
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A naturally occurring example of refraction is the rainbow, which is created when sunlight is refracted by raindrops. White light consists of different wavelengths, with blue having a shorter wavelength than red. When light passes through raindrops, the shorter wavelengths are bent more than the longer ones, splitting the light into its different colours.
refraction
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In optics, refraction occurs when waves pass from a medium with a given refractive index to a medium with a differing refractive index at an oblique angle. The refraction phenomenon is mostly associated with light but can also be applied to other waves such as sound or water.
The refractive index, n, of a transparent medium is defined as the ratio of the speed of light in a vacuum to the speed of light in the given medium. The formula is given by:
Where c is the speed of light in a vacuum and v is the speed of light in the desired medium
The amount of bending is based on the indices of refraction of the two media and is described quantitatively by Snell's Law. This relates the incident angle i and the refracted angle r (measured from the normal line N) to the refraction indices of the two media n1and n2.