According to corpuscular theory of light, the different colours of light are due to
Different electromagnetic waves
Different force of attraction among the corpuscles
Different size of the corpuscles
None of the above
In the adjacent diagram,$ CP$ represents a wavefront and $AO$ & $BP$, the corresponding two rays. Find the condition on $\theta$ for constructive interference at $P$ between the ray $BP$ and reflected ray $OP$
Explain plane wave refraction from denser to rarer medium using Huygen's principle.
Huygen's theory of secondary waves can be used of find
Is Huygen's principle valid for longitudunal sound waves ?
Wavefront means