Stars/Oranges/Quiz

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This is a wide-field image in the region of NGC 3603 taken on the ground by the Digitized Sky Survey 2. Credit: NASA, ESA, and the Digitized Sky Survey 2.

Orange stars is a lecture from the radiation astronomy department for possible inclusion in the course on the principles of radiation astronomy and is already in the star courses.

You are free to take this quiz based on orange stars at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{stars resources}} template. This should give you adequate background to get 100 %.

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Quiz[edit]

  

1 True or False, Oxygen emissions can be green or brownish-red depending on the amount of energy absorbed.

TRUE
FALSE

2 Which of the following is not a phenomenon associated with green astronomy?

a stellar class G dwarf
the hydrogen Balmer beta line
the photosphere of the Sun
an emission with a wavelength of 618 nm
"ionization cones"
boron ion emission

3 True or False, Hydrogen has an emission line in the orange.

TRUE
FALSE

4 Phenomena associated with some brown dwarfs are which of the following?

lithium
a temperature well below the stellar range
methane absorption
the lithium test
X-rays
T dwarfs

5 True or False, Lithium has an orange line at about 671 nm.

TRUE
FALSE

6 Which of the following are phenomena associated with the orange system?

titanium
yttrium
navels
a number of emission lines very close together
many impact craters on Io
ScO

7 True or False, PTF 10fqs is brighter than a nova, but fainter than a supernova.

TRUE
FALSE

8 Historically, orange astronomy is not known for which of the following?

Alpha Centauri B
Epsilon Eridani
Saturn
K spectral type stars
the Bayer designation for a star
the Indian city of Pondicherry in December 1689

9 Yes or No, The orange portion of the visible spectrum is from 590 to 620 nm in wavelength.

Yes
No

10 Complete the text:

Match up the radiation letter with each of the detector possibilities below:
Optical rays - L
Visual rays - M
Violet rays - N
Blue rays - O
Cyan rays - P
Green rays - Q
Yellow rays - R
Orange rays - S
Red rays - T
multialkali (Na-K-Sb-Cs) photocathode materials

.
F547M

.
F675W

.
broad-band filter centered at 404 nm

.
F588N

.
thallium bromide (TlBr) crystals

.
F606W

.
18 micrometers FWHM at 490 nm

.
wide-gap II-VI semiconductor ZnO doped with Co2+ (Zn1-xCoxO)

.

11 True or False, Fluorine has a number of lines in the orange.

TRUE
FALSE

12 The atmosphere of Titan which has a natural orange color is composed largely of?

13 True or False, Ultraviolet radiation from young massive stars carves and heats the surfaces of cold hydrogen gas clouds. The warmed surfaces glow orange and red.

TRUE
FALSE

14 Which orange astronomy phenomena are associated with globular clusters?

a yellow-orange filter (F606W)
many older K-type stars
spherical collection of stars
orbit the cores of galaxies
some of the more ancient stars

15 True or False, Of some 824 red giant stars, lithium is detected in several stars.

TRUE
FALSE

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

17 Complete the text:

The orange and brown coloration in the clouds of

are caused by

compounds that change color when they are exposed to

light from the Sun.


Hypotheses[edit]

  1. Orange stars reveal details otherwise not available at other wavelengths.

See also[edit]

External links[edit]

{{Principles of radiation astronomy}}