Huygen's conception of secondary waves
Allow us to find the focal length of a thick lens
Is a geometrical method to find a wavefront
Is used to determine the velocity of light
Is used to explain polarisation
Derive the laws of refraction from the concept (Huygen's principle) of the wavefront.
Figure, shows wave fronts in still water moving in the direction of the arrow towards the interface $PQ$ between a shallow region and a deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
What is visible light ? Write various view on it.
Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface $PQ$ between a shallow region and $a$ deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
Is Huygen's principle valid for longitudunal sound waves ?