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Stars/Ultraviolets/Quiz

< Stars‎ | Ultraviolets

Ultraviolet stars is a lecture that may become part of the radiation astronomy course on the principles of radiation astronomy and is included in the star courses.

Alnitak is a triple star system with an O9.7 supergiant and an O9 giant as well as a B0 giant. These stars illuminate the nearby Flame Nebula. Credit: Mdf, 2MASS/G. Kopan, R. Hurt.

You are free to take this quiz based on ultraviolet 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 %.

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!

Quiz edit

  

1 Complete the text:

Ordinary glass is partially

to UVA but is

to shorter wavelengths, whereas silica or

glass, depending on quality, can be

even to vacuum UV wavelengths.

2 Complete the text:

The First Byurakan Survey commenced in 1965 using the

telescope at the Byurakan Astrophysical Observatory. The purpose of the survey was to find galaxies with an

excess.

3 Which of the following is associated with the ultraviolet?

black light
germicidal
fluorescence
Charles Stuart Bowyer
Hα emission
PG 1159

4 True or False, The surface of the Sun is readily imaged in the ultraviolet.

TRUE
FALSE

5 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)

.

6 Complete the text:

The spectral region bounded on the long wavelength side by the atmospheric

absorption and on the short wavelength side by the photoionization of interstellar

is the ultraviolet.

7 Complete the text:

To measure the color index, observe the magnitude of the object successively through two different filters such as

and blue (B), or blue and

.

8 True or False, Spectroscopically Zeta Puppis is classified as O4 I.

TRUE
FALSE

9 Complete the text:

The

series is the series of transitions and resulting ultraviolet emission lines of the

atoms as an electron goes from a high-energy level to an n =

level.

10 True or False, BI 253 is an O2V star in the Large Magellanic Cloud.

TRUE
FALSE

11 Complete the text:

Match up the object viewed in the ultraviolet with its image:
Sun's chromosphere- L
calcite - M
Venus - N
Jupiter's aurora - O
Jupiter - P
Io - Q
Saturn - R
Betelgeuse - S
Mira - T
LAB-1 - U
Messier 101 - V
 

.
 

.
 

.
 

.
 

.
 

.
 
 

.
 

.
 

.
 

.

12 True or False, The first direct observation of waves propagating into and through the solar corona was made in 1997 with the SOHO space-borne solar observatory.

TRUE
FALSE

13 Which of the following radiation phenomena are associated with the ultraviolet?

He II lines
B I line
Be II lines
carbon III line
Hβ emission
oxygen O I lines

14 Yes or No, Stellar class O stars have surface temperatures high enough that most of their luminescence is in the ultraviolet.

Yes
No


Hypotheses edit

Main article: Hypotheses
  1. Ultraviolet radiation can be an indicator of surface fusion above the photosphere of stars.

See also edit

External links edit

{{Radiation astronomy resources}}

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