Ray diverging from a point source from a wave front that is
Cylindrical
Spherical
Plane
Cubical
(b)
Huygen's theory of secondary waves can be used of find
Explain the reflection of a plane wave using Huygen's principle.
Derive the laws of refraction from the concept (Huygen's principle) of the wavefront.
Explain the reflection of plane wavefront from concave mirror.
Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image ?
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