Radiation astronomy/Beta particles/Quiz

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Beta particles are produced by X-rays passing through air. Credit: Unknown.

Beta-particles astronomy is a lecture and an article from the astronomy department that is under development for possible inclusion in the course on the principles of radiation astronomy.

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1. Yes or No, Van Allen radiation belt electrons are constantly removed by collisions with atmospheric neutrals, losses to the magnetopause, and outward radial diffusion.


2. Yes or No, Beta particles (electrons) are more penetrating than alpha particles, but still can be absorbed by a few millimeters of aluminum.


3. Which types of radiation astronomy directly observe the rocky-object surface of Venus?

meteor astronomy
cosmic-ray astronomy
neutron astronomy
proton astronomy
beta-ray astronomy
neutrino astronomy
gamma-ray astronomy
X-ray astronomy
ultraviolet astronomy
visual astronomy
infrared astronomy
submillimeter astronomy
radio astronomy
radar astronomy
microwave astronomy
superluminal astronomy

4. Yes or No, Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei.


5. When the Earth is viewed from space using X-ray astronomy what characteristic is readily observed?

the magnetic north pole
the Hudson Bay meteorite crater
the South Atlantic Anomaly
the Bermuda Triangle
solar positron events
electrons striking the ionosphere

6. True or False, Electrons in the Earth's magnetosphere are energized by neutral particles from the Sun.


7. Complete the text:

Match up the item letter with each of the possibilities below:
Meteors - A
Cosmic rays - B
Neutrons - C
Protons - D
Electrons - E
Positrons - F
Gamma rays - G
Superluminals - H
X-ray jets
the index of refraction is often greater than 1 just below a resonance frequency .
iron, nickel, cobalt, and traces of iridium .
Sagittarius X-1 .
escape from a typical hard low-mass X-ray binary .
collisions with argon atoms .
X-rays are emitted as they slow down .
Henry Moseley using X-ray spectra .

8. Yes or No, Positron astronomy is 30 years old but remains in its infancy.


9. What are some of the characteristics of Jovian electrons?

hard spectrum
Jovian electrons near Earth are on their way to the Sun
an energy power law
flux increases with 27 day periodicities
at 1 AU, flux decreases exhibit a short-term modulation of 13 minutes
come in mutable varieties

10. Yes or No, A clumpiness in the galactic halo is through a spatially continuous elevation in the density of dark matter, rather than the more realistic discrete distribution of clumps.



Main source: Hypotheses
  1. The radiation astronomy of beta particles (electrons and positrons as a group) may provide insight into fusion reactions above the Sun's photosphere.

See also[edit]

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