Physics - Wave Optics Question with Solution | TestHub

According to Huygen's wave theory of light, light travels in the form of waves. The different colours of light are due to different wavelengths of these waves.

The statement that different colours of light are due to different sizes of corpuscles is a postulate of Newton's corpuscular theory, not Huygen's wave theory.

Huygen's theory successfully explains the laws of reflection and refraction, and it correctly predicts that the speed of light in a denser medium is less than that in a rarer medium.

Answer: Different colours of light are due to different sizes of the corpuscles.