What do you mean by 'rectilinear propagation of light'?
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The motion of light in a straight line path is called the rectilinear propagation of light.
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How can you obtain a point source of light?
Define the terms : a ray of light and a beam of light.
In which of the following two arrangements (a) and (b) shown in figure below, you can see the light of the bulb? Explain your answer.
Name a simple application of the rectilinear propagation of light.
