Light wave travel in vacuum along the $x$-axis, which of the-following may represent the wave front
$x=a$
$y=a$
$z=a$
$x+y+z=a$
(a)
Wave front is always perpendicular to direction of propagation of light.
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 ?
Explain the wavefront and its types.
According to corpuscular theory of light, the different colours of light are due to
Huygen's conception of secondary waves
Ray diverging from a point source from a wave front that is
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