What enters the eye to let us see colours?What do you see in a mirror? - Light, Name a valuable, extremely hard, colourless gemstone - Diamond, What are lenses, windows and prisms usually made of? - Glass, What do we call something that can be seen through clearly? - Transparent, What do we call something that does not transmit light? - Opaque, Where on an object is the light absorbed or reflected? - The surface, Give a word that means a picture formed by light. - Image, What do you see in a mirror? - A reflection, What do we call the line at right angles to a surface or interface? - The normal, What is the scientific term for the incoming light ray? - The incident ray, Name the main optical component in spectacles(glasses) and telescopes - A lens, Which colour surface reflects all incident light equally? - White, Which colour surface absorbs all incident light? - Black, What is the scientific term for the colours of the rainbow? - Spectrum, What do we call something that lets light through but does not let us see clearly? - Translucent, What do we call the change in direction of a light ray when it moves from one medium to another? - Refraction,

Light - Glossary

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