Radiation astronomy/Molecules/Quiz

Molecular radiation astronomy is a lecture as part of the radiation astronomy department course on the principles of radiation astronomy.

This is Saturn imaged with the Stockholm Infrared Camera (SIRCA) in the H2O band. Credit: M. Gålfalk, G. Olofsson and H.-G. Florén, Nordic Optical Telescope.

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1 Complete the text:

A white beam source focused on a sample, upon striking the sample has photons whose energy matches the


in order to excite the molecules of the sample, while the other photons transmit unaffected and give the sample the


2 True or False, The density distributions of a solid or unit of condensed matter involving more than atoms or molecules is not discrete like a spectral density but continuous.


3 Which of the following is not a studied characteristic of astrochemistry?

interstellar atoms
interaction of radiation with molecules
organics of interstellar origin
interstellar precursors

4 True or False, The focus of the Submillimeter Wave Astronomy Satellite is five spectral lines from water, isotopic water, isotopic carbon dioxide, molecular oxygen, and neutral carbon.


5 The orange band from molecular calcium chloride is observed in the spectra of many stars of what type?

6 True or False, The Earth's atmosphere does not transmit green radiation between 480 and 500 nm in wavelength because of water vapor.


7 Complete the text:

One of the reasons why detection of

is controversial is that although

(and some other methods like rotational spectroscopy) are good for the identification of simple species with large dipole moments, they are less sensitive to more

molecules, even something relatively small like


8 True or False, Molecular lines for H2O in the spectra for Vega are likely from water vapor in the Earth's atmosphere or the accretion disk around Vega.


9 Chemistry phenomena associated with astronomy are

at least three-quarters of the human genome

10 Which chemical phenomenon are associated with the Earth?

quartz is the second most abundant mineral
an atmosphere containing CO2
green, red, blue, and yellow airglow
the production and escape of hot H+ ions
oxygen emissions
helium ions

11 Complete the text:

Condensed noble gases, most notably liquid

and liquid

, are excellent radiation detection


12 Yes or No, The number of molecules of a compound per a molecule of hydrogen is called the mixing ratio.


13 Complete the text:

Match up the item letter with each of the possibilities below:
Interstellar comet - A
Neutrals - B
Geminga - C
star formation region - D
Local Hot Bubble - E
H II regions - F
Ring Nebula - G
molecular cloud - H
supernova remnant - I
Messier 17 - J
empty space - K












14 Chemistry phenomena associated with star-forming regions are

silicate dust
hydrogen molecules
polycyclic aromatic hydrocarbons (PAHs)

15 True or False, Airglow is the emission of light by atoms and molecules in the upper atmosphere after they are excited by X-ray radiation.


16 Which of the following is likely to apply to a solar binary?

a high relative velocity between the solar system and the cometary medium of a passage through a molecular cloud
none of the captured bodies may localize in the Oort cloud
none of the captured bodies localize near the Sun
some captured bodies may localize near Jupiter
the Jupiter system may be a control group

17 Which of the following are characteristic of a binary formed via gravitational fragmentation?

the local Jeans length
the local speed of sound
the mean molecular weight
the electron neutrino
the mean particle density


  1. A sense-around system needs to incorporate detection of all forms of radiation.

See alsoEdit

External linksEdit

{{Radiation astronomy resources}}