The “lighthouse” analogy is associated with*1 pointWhite dwarf starsNeutron starsPulsarsBlack holesQuasars

The “lighthouse” analogy is primarily associated with pulsars.

Pulsars are a type of neutron star that emits beams of electromagnetic radiation out of their magnetic poles. As these beams sweep across space, similar to the way a lighthouse beam sweeps across the sea, they can be detected if they are aligned with Earth. The analogy highlights the periodic nature of the emission, which is observed as regular pulses of radiation, much like the regular bursts of light from a lighthouse signaling to ships. This regularity in their emissions results from the rapid rotation of the neutron star, leading to intervals that are incredibly stable and precise.

In conclusion, the key to understanding the lighthouse analogy is recognizing the rotating nature of pulsars and how they emit directional beams of radiation, analogous to a lighthouse signaling with its rotating light.