英语翻译

题目

英语翻译
a pulsar is a celestial object that emits llight in short burst a pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the rotation of a spherical object that emits light from a pair of diametrically opposed "flashlights" on its equator.what is the maximum radius of the pulasae if no part of its surface can move faster than the speed of light?

答案

A pulsar is a celestial object that emits light in short burst.脉冲星是一种能够发出光脉冲的天体.A pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the r...