Task id16718

Task id16718

A neutron star (pulsar) with a radius of 15 km makes 103 rev/s (see problem 14.21). It emits a narrow beam of X-rays that glides across the Earth's surface (Fig. 6.17). What is the speed of the beam if the distance from the pulsar to the Earth is 10 sv. years? Is there a paradox here?

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