Background astronomy/Quiz

This image depicts the two gigantic gamma-ray bubbles at the heart of the Milky Way. Credit: NASA's Goddard Space Flight Center.

Background radiation astronomy, or background astronomy is a lecture that is part of the radiation astronomy department's radiation astronomy project. It has been included since the 2016 fall version of principles of radiation astronomy as a lecture.

You are free to take this quiz based on background radiation astronomy at any time.

To improve your scores, read and study the lecture, the links contained within, listed under See also, External links, and in the Template:Tlx templates. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

Suggestion: Have the lecture available in a separate window.

To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing! Template:Clear

Quiz

<quiz>

{Yes or No, The temperature distribution of the intergalactic medium (IGM) depends on whether or not there exist strong galactic winds. |type="()"} + Yes - No

{Which of the following are theoretical radiation astronomy phenomena associated with a satellite in orbit around the Earth? |type="[]"} + background radiation - a charged particle wind which emanates out of a beam line + gravity + near the barycenter for the Earth-Moon system - swirls of tan, green, blue, and white in the water + electric arcs + chlorophyll-containing phytoplankton aloft in the upper atmosphere

{Yes or No, Outflow from the galaxy M82 of PAHs is embedded in a gaseous wind. |type="()"} + Yes - No

{A cosmic ray may originate from what astronomical source? |type="()"} - Jupiter - the solar wind - the diffuse X-ray background - Mount Redoubt in Alaska - the asteroid belt + an active galactic nucleus

{Yes or No, High energy neutrinos may interact to produce a large cascade of particles. |type="()"} + Yes - No

{Complete the text: |type="{}"} Cosmic rays with energies over the { threshold (i) } energy of 5 x 10¹⁹ { eV (i) } interact with { cosmic microwave background (i) } photons to produce { pions (i) } via the $\mathrm{\Delta }$ resonance.

{Yes or No, The main components of background noise in neutron detection are high-energy photons, which aren't easily eliminated by physical barriers. |type="()"} + Yes - No

{Which of the following are astrophysical components contributing to the sky background? |type="[]"} + sets of point sources like faint asteroids - a charged particle wind + Galactic stars + far away galaxies - swirls of tan, green, blue, and white in the water + dust in the Solar System + dust in the Milky Way + dust in intergalactic space

{Complete the text: |type="{}"} A proof-of-concept structure, including a control group, consists of { background (i) }, procedures, findings, and { interpretation (i) }.

{Which of the following are cold dark matter gamma rays? |type="[]"} + expected signal comparable to background + annihilation radiation - a pronounced cosmic-ray halo + difficult to separate from a dark halo + dwarf spheroidals - weakly interacting massless particles

{Complete the text: |type="{}"} The { cosmic infrared background (i) } (CIB) causes a significant attenuation for very high energy { protons (i) } through { inverse (i) } Compton { scattering (i) }, { photopion (i) } and electron-positron pair production.

{Which of the following are likely associated with a green emission line control group? |type="[]"} - rocky objects + high peak to background + plasma objects + a G2V photosphere - rotation - watery surface - spots

{With respect to electromagnetic radiation, which of the following are types of backgrounds? |type="[]"} - cosmic optical background (COB) - cosmic dust + cosmic ultraviolet background (CUVB) + cosmic X-ray background (CXB) - cosmic cyanogen background (CCB) + cosmic infrared background (CIB) - rocky objects + diffuse extragalactic background radiation + extragalactic background light (EBL) + CMB - meson background + cosmic gamma-ray background (CGB) + cosmic radio background

</quiz>

Hypotheses

1. Sometimes the apparent background is actually the signal.

See also

• Blue astronomy/Quiz
• Cyan astronomy/Quiz
• Gamma-ray astronomy/Quiz
• Green astronomy/Quiz
• Infrared astronomy/Quiz
• Microwave astronomy/Quiz
• Orange astronomy/Quiz
• Radio astronomy/Quiz
• Submillimeter astronomy/Quiz
• Ultraviolet astronomy/Quiz
• Violet astronomy/Quiz
• Visual astronomy/Quiz
• X-ray astronomy/Quiz
• Yellow astronomy/Quiz