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What is the shape of the wavefront on earth for sunlight?
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As we know that, the sun is very far from the earth. Considering sun as spherical, it can be considered as point source situated at infinity.
Due to the very large distance the radius of wavefront can be considered as large infinity and so, wavefront is plane.
Due to the very large distance the radius of wavefront can be considered as large infinity and so, wavefront is plane.
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