Which of the following pairs of colours are the primary colours of light?
ARed, yellow and blue
BRed, green and blueCORRECT
CCyan, magenta and yellow
DRed, orange and violet
GCEPhysicsLight and Optics2021
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Why the answer is B, and why the others tempt you.
The primary colours of light (additive primaries) are red, green, and blue. When combined in equal intensities, they produce white light. Option C lists the primary pigment colours (subtractive primaries), while A lists the traditional primary colours used in painting.
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