Plane mirror - A flat mirror, Object - The light rays come from this to form an image after reflection., Incident ray - A ray of light hitting a surface., Normal - A line at right angle to the surface of the mirror., Angle of incidence - The angle between the incident ray and the normal, Reflected ray - Ray of light bouncing off a mirror, Angle of reflection Angle of reflection  - The angle between the reflected ray and the normal, Image - View of the object formed by the reflected light rays, Luminous object - Object that produces its own light, Non-luminous object - Object viewed by light reflecting off it, Ray of light - A narrow beam of light, Path of light - Straight Lines, The speed of light - 300 million metres per second or 300,000,000 m/s, Umbra - A dark shadow formed where no light falls, Penumbra - A light shadow formed where some light falls, but some is blocked., Sharp Shadow - Formed if the light source is very tiny and concentrated in one place (a point source)., A point source - A light source that is very tiny and concentrated in one place, Transparent material - Allows light to travel through them., Opaque material -  Does not let light travel through them.,

Light Definitions

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