The red paint will appear no colour when it is illuminated with pure blue light.
Why does a red colour appear as red?
- When visible light of all wavelengths incident on a red coloured object, it absorbs all the wavelengths accept red colour.
- So it is reflected from its surface and makes the object red.
What does happen when red coloured object is illuminated by pure blue light?
- As the pure blue light has no red coloured wavelength, so the object cannot reflect the red light wavelength.
- So we will get no reflection from the object.
Thus, we can conclude that the red coloured object appears colourless as it is illustrated by pure blue light.
Learn more about the colour reflection here:
brainly.com/question/15257436
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