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Wave Optics

Question
CBSEENPH12038438
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What type of wavefront will emerge from a (i) point source, and (ii) distant light source?

Solution
i) Spherical wavefronts are emitted for a point source in space. 

ii) A distant light source often acts as a point source and hence spherical wavefronts will emerge.

Some More Questions From Wave Optics Chapter

Let us list some of the factors which could possibly influence the speed of wave propagation:
(i) nature of source.
(ii) direction of propagation. 
(iii) motion of source and/or observer.
(iv) wave length.
(v) intensity of the wave.
On which of these factors, if any, does
(a) the speed of light in vacuum,
(b) the speed of light in a medium (say, the glass or water) depend?

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