light - A form of energy that travels in a wave from a source. , light source - An object that makes its own light. , reflection - This is when a light bounces off a surface, changing the direction of a ray of light. , incident ray - A ray of light that hits a surface., reflected ray - A ray of light that has bounced back after hitting a surface. , the law of reflection - This states that the angle of the incident ray is equal to the angle of the reflected ray. , refraction - This is when light bends as it passes from one medium to another. , visible spectrum - Light is visible to the human eye. It is made up of a colour spectrum. , prism - A 3D shape with flat sides. The two ends are an equal shape and size. , shadow - An area of darkness where light has been blocked. , transparent - Objects which let light travel through them easily, meaning you can see through the object., translucent - Describes objects that things let some light through, but scatters the light so we can't see through them properly., opaque - Describes objects that do not let any light pass through them. ,

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