Final answer:
The pulsed radiation from a pulsar is due to the rapid rotation of a neutron star with misaligned magnetic and rotational axes, acting like a lighthouse as it beams radiation across the universe.
Step-by-step explanation:
The pulsed nature of the radiation at all wavelengths that is seen to come from a pulsar is produced by the rapid rotation of a neutron star that is producing two oppositely directed beams of radiation. This occurs because the rotational axis of the neutron star is misaligned with its magnetic axis, which leads to the emission of narrow, focused beams of particles from the magnetic poles. As the neutron star rotates, these beams sweep across space like the beams of a lighthouse, and when one aligns with the Earth, a pulse of radiation is detected. It is this lighthouse effect that makes a pulsar observable.
Pulsars are highly magnetic, rotating neutron stars, remnants of supernovae. They emit radiation across a wide electromagnetic spectrum. A well-known example of a pulsar lighting up its surroundings is the Crab Nebula, where energy from a pulsar energizes the slower-moving material from the supernova, making it 'glow' at many different wavelengths.