light travels in straight line working model inspire award science project | howtofunda | physics project
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In this video, we’ll show you how to make an effective demonstration using light, cardboard tubes, and aligned holes to prove that light travels in a straight line. This principle is one of the basics of optics .

Concept Demonstrated:

Light cannot bend around obstacles
Light travels in straight paths unless reflected or refracted
Visual proof using torchlight and cardboard

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