Why Does Light Travel in Straight Lines?

Answer

Light travels in a straight line because this is the path of least resistance. This allows light to travel in a path that will make it travel in the shortest time. This idea was first postulated by Eculid in the year 300BC.
Q&A Related to "Why Does Light Travel in Straight Lines"
Seemingly innocent questions like this gave rise to Quantum Mechanics. It turns out that light explores ALL paths between the source and the observer. And they all cancel out except
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Light explores all paths between locations, and the path of least resistance is chosen,
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Light comes from the sun using particles called photons. It would seem that they line up in the form of an electromagnetic wave and propergate across space radially but in straight
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Light DOES always travel in a straight line. It is true that close to a massive object the light may 'appear' to bend, but this is simply because mass bends space - a straight line
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