An observer traveling with speed 0.5c moves directly toward a beacon emitting photons with speed c in her direction. The observer measure the speed approaching photons to be
(a) 0.25c
(b) 0.5c
(c) c
(d) 1.5c
Ans: (c) c
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Indicate whether the statement is true or false
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a. 90° b. 180° c. 270° d. 360°
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