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- Light is a type of electromagnetic radiation that can be detected by the eye. It travels as a transverse wave. Unlike a sound waves, light waves do not need a medium to pass through, they can travel through a vacuum. Light from the Sun reaches Earth through the vacuum of space.
www.bbc.co.uk/bitesize/articles/ztmsp4j
May 24, 2024 · We know that light is a wave based on how it behaves – it exhibits the same properties of other waves we have examined – it interferes with itself, it follows an inverse-square law for intensity (brightness), and so on.
The changing of a light ray’s direction (loosely called bending) when it passes through variations in matter is called refraction. Refraction is responsible for a tremendous range of optical phenomena, from the action of lenses to voice transmission through optical fibers.
Refracted light rays behave in the following ways: Light traveling from a more dense to a less dense medium refract away from the normal. This behavior is exhibited by light moving from water to air. Light traveling from a less dense to a more dense medium refract towards the normal. This behavior is exhibited by light moving from air into water.
The changing of a light ray’s direction (loosely called bending) when it passes a boundary between materials of different composition, or between layers in single material where there are changes in temperature and density, is called refraction.
Light and other forms of electromagnetic radiation move through a vacuum with a constant speed, c, of 2.998 × 10 8 m s −1. This radiation shows wavelike behavior, which can be characterized by a frequency, ν, and a wavelength, λ, such that c = λν. Light is an example of a travelling wave.
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Refraction of light is the change in direction (bending of light rays) when it passes from one optically transparent medium to another. When light passes from one medium to another (for example, from air into glass), it changes direction. This change in direction is called refraction.
