How can light travel in straight lines?
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Explanation:
In a dusty atmosphere it is sometimes possible to see light travelling and it does appear to be moving in a straight line. The fact that light travels can be demonstrated by putting an object in its path. ... As light does appear to travel in straight lines then light is usually modelled as straight lines in drawings.
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Answer:
Light travels in a straight line. once light has been produced, it will keep travelling in a straight line until it hits something else .Shadows are evidence of light travelling in a straight lines. An object blocks light so that it can't reach the surface where we see the shadow.
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