This refers to additive colour mixing, which is relevant for light. The primary colours of light are Red, Green, and Blue (RGB). When these primary colours are mixed in different proportions, they produce other colours. Combining two primary colours results in a secondary colour: Red + Green = Yellow, Red + Blue = Magenta, Green + Blue = Cyan.
Which one of the following colours may be obtained by combining green and red colours ?
Asked in UPSC NDA 1 2021 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)
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