A pulsar is a rapidly spinning neutron star which emits:
Correct answer: B. Radio waves detectable from Earth
- A. A blinding light when it aligns with the planets
- B. Radio waves detectable from Earth
- C. A gravitational pull which attracts high energy dust particles
- D. Enough energy to power itself indefinitely
Explanation
A pulsar’s rotating magnetic field directs beams of electromagnetic radiation, often radio waves, toward space. We detect pulses when the beam sweeps across Earth, like a cosmic lighthouse.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Astronomy and Space
Astronomy covers the structure and motions of the solar system, planets, satellites, comets, asteroids and meteoroids, together with gravity, eclipses, seasons and phases of the Moon. It also introduces stars, galaxies, nebulae, black holes, space telescopes and satellites, while distinguishing rotation from revolution and meteors from meteorites.
Practise Astronomy and Space
286 free Astronomy and Space MCQs from Everyday Science, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Everyday Science questions like this
Everyday Science is on 40 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Astronomy and Space questions
In a typical H-R diagram, stars are graphed by these two characteristics:
You have discovered a new celestial body. It has a thick atmosphere and it produces powerful cosmic winds and, when observed, the clouds obscure the body. You have determined it is this type of star.
When a star becomes a singularity and has zero volume and infinite density, it is called_______________?
What sub-class of neutron star is known for its extremely high magnetic field?
When our sun reaches the end of its red giant phase, it will turn into a___________?
Current stage of star 'Sun' is___________?