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Question
What type of wavefronts are associated with a source infinity?
Options
Cylindrical wavefronts
Plane wavefronts
Spherical wavefronts
All types of wavefronts
Solution
Plane wavefronts
Explanation:
A distant source is so far away that it is thought to be infinity. Rays traveling from a distant light source are assumed to be planes moving in the direction of wave propagation, and so the wavefront is a plane wavefront.
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