1)The light travelling in any one direction in a straight line is called
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, light is modeled as traveling in straight lines called rays. ... The word ray comes from mathematics and here means a straight line that originates at some point. It is acceptable to visualize light rays as laser rays (or even science fiction depictions of ray guns).
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The light traveling in any one direction in a straight line is called a ray of light. A group of light rays given out from a source is called a beam of light.
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