Question

explain that light travels in a straight line​

Answer 1

Answer:

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Explanation:

Light travels in a straight line can be observed by keeping an object in the path of light. In an atmosphere which is bit dusty, we can see light traveling in a straight line. Light emerging from the torch, train and lamps always travel in a straight line.

Answer 2

Answer:

Light travels in straight lines

An object blocks light so that it can't reach the surface where we see the shadow. Light fills up all of the space before it hits the object, but the whole region between the object and the surface is in shadow .  

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Explanation: