Question
What is the shape of the wavefront on Earth for Sunlight?
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Answer
The shape of the wavefront on Earth for Sunlight is a plane.
We know that the sun is at a very large distance from the earth. Assuming the sun is spherical, it can be considered as a point source situated at infinity. Due to the large distance, the radius of the wavefront can be considered as large (infinity) and hence, the wavefront is almost plane.
We know that the sun is at a very large distance from the earth. Assuming the sun is spherical, it can be considered as a point source situated at infinity. Due to the large distance, the radius of the wavefront can be considered as large (infinity) and hence, the wavefront is almost plane.
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