Optical filter facts for kids
An optical filter is a device that selectively transmits light of different wavelengths. It is usually made of coloured glass or plastic. Optical filters are commonly used in optical instruments (such as colorimeters), as photographic filters and to colour stage lighting.
Images for kids
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Coloured and neutral-density filters
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Stacked cases of Cokin filters
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See also
In Spanish: Filtro óptico para niños
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Optical filter Facts for Kids. Kiddle Encyclopedia.