Since the mirror is rotating at a constant speed, light will be visible at regular intervals, thus appearing to pulse. Why pulsars spin so rapidly Most pulsars rotate once or a few times per second. Compare this with the earth, which rotates once every 24 hours. The rapid rate of rotation stems from the pulsar's former life as a much larger star that was spinning more slowly. When the star collapsed into a tiny neutron star its rate of spin had to increase dramatically in order to conserve angular momentum.
Pulsars are usually very far away so little visible light reaches the earth.
However, they also emit a good deal of energy at wavelengths outside the visible light spectrum, which can be received with radio telescopes. All rights reserved. Legal notice .