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Answer :
Final answer:
The rate of flashing lights can vary, but in the context of observing the speed of light, like in the given scenario, observer B would see the flashes as simultaneous irrespective of the flashing rate. This is due to the speed of light being constant and its invariance from the motion of its source, according to the Special Theory of Relativity. For a practical example, a fluorescent light bulb flickers about 120 times per second due to AC
Explanation:
The rate at which lights should flash can vary depending on the purpose of the flashing light. In basic physics, as per the question, we're observing the speed of light and how it is perceived by different observers from varied perspectives (observer A and observer B). Both are witnessing light flashes but may perceive it differently due to relative motion.
Specifically, in the case mentioned, observer B who is stationary (compared to moving observer A) will see the flashes of light as simultaneous, regardless of the rate at which they flash. This is because the speed of light is constant and not affected by the source's motion. This is derived from the second postulate of special relativity.
However, as seen in our daily life, if a fluorescent light bulb is considered (which acts like a resistor in an electric circuit), it can brighten and dim about 120 times per second due to alternating current causing it to flicker. The flickering is occurring so rapidly (120 Hz) that our eyes cannot detect it.
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