Dose light travel in stright or curved lines?

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Answer:
Light travels in straight lines. However, 'straight' ain't what it used to be. Our current understanding of the universe suggests that mass causes a localized distortion in space time, effectively curving space around itself. As a beam of light approaches a massive object, it can be affected in this way as it passes through the curved space. From outsie, it appears to travel in a curved path, but as far as the light is concerned, it's moving in a straight line -- it's just that the straight line exists in a curved reality, if you follow me.
First answer by S1764. Last edit by S1764. Contributor trust: 0 [recommend contributorrecommended]. Question popularity: 1 [recommend question].

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