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C. A flash of light is emitted at position 1 on the x-axis and is absorbed at position 2-+d In a reference frame moving with velocity v along the x-axis: (a) What is the spatial separation d between the point of emission and the point of absorption of the light? (b) How much time elapses between the emission and the absorption of the light?

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Spatial separation in xy frame = x2-x,-d Since, xy frame is moving with speed v relative to xy frame along x axis. Here, x and x are common for both frame. So, with respect toxy frame, xy frame is moving opposite to xx frame By applying the formula for length contraction, 72 Ans. This is spatial distance observed in frame y. Fro m the postulate of special theory of relativity, Speed of light is same for all inertial frame of reference. So, speed of light in frame either xy or frame xy would be same as c So, time interval observed in framexy d

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