Intensity astronomy/Quiz

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This gamma-ray spectrum contains the typical isotopes of the uranium-radium decay line. Credit: Wusel007.

Intensity astronomy is a lecture. It is an offering from the radiation astronomy department. Although under development, it may eventually be used as a lecture in the advanced undergraduate course principles of radiation astronomy.

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

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Quiz[edit | edit source]


1 Yes or No, A time-averaged flux is called an intensity.


2 True or False, Intensity astronomy focuses on creating a sufficient intensity for a desired property or characteristic that a signal may be converted in a detector to an electric current.


3 Which of the following are theoretical radiation astronomy phenomena associated with a satellite in orbit around the Earth?

background radiation
a charged particle wind which emanates out of a beam line
near the barycenter for the Earth-Moon system
swirls of tan, green, blue, and white in the water
electric arcs
intensity of radiation

4 Yes or No, Visually dark infrared sources can be radiative cosmic dust, hydrogen gas such as an H II region (e.g. the Orion Nebula), an H I region of hydrogen, a molecular cloud, or a coronal cloud.


5 A cosmic ray may originate from what astronomical source?

the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
an active galactic nucleus

6 True or False, Each element has electronic orbitals of characteristic energy.


7 Complete the text:

Cosmic rays with energies over the

energy of 5 x 1019

interact with

photons to produce

via the resonance.

8 Complete the text:

A proof-of-concept structure, including a control group, consists of

, procedures, findings, and


9 Which of the following are cold dark matter gamma rays?

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

10 Which of the following are likely associated with the intensity of a green emission line?

rocky objects
high peak to background
plasma objects
a G2V photosphere
watery surface

Hypotheses[edit | edit source]

  1. Intensity-based questions may require extensive facility with detectors.

See also[edit | edit source]

References[edit | edit source]

External links[edit | edit source]

{{Radiation astronomy resources}}Template:Sources resource