What is Light?

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We all know what light is. We also know that the Sun, fire, bulbs, and glowworms all give us light. But what exactly is light?
Light is a form of energy that which we can see. It is made up of billions of tiny particles called photons. These photons travel from one place to another in waves.
The light that we can see consists of photons that move at a wavelength that makes it visible, and is known as visible light.
Visible light is actually made up of different colours. Among the different photons that are in visible light, the ones that have the longest wavelength look red to us, and the ones that have the shortest wavelength look violet to us.
Red, green, and blue are the primary colours of light. Mixing them in various ways will make all other colours, including white.
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