Stars/Ultraviolets/Quiz

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.

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.

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

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Quiz

Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:

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

.

.

.

.

.

.

File:Betelgeuse star hubble-580x580.jpg .

.

.

.

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

Main resource: Hypotheses

1. Ultraviolet radiation can be an indicator of surface fusion above the photosphere of stars.

See also

• Astronomy/Quiz
• Green astronomy/Quiz
• Planetary science/Quiz
• Radiation astrochemistry/Quiz
• Radiation astrogeography/Quiz
• Radiation astrohistory/Quiz
• Radiation astronomy/Quiz
• Stars/Quiz

External links

• International Astronomical Union
• NASA/IPAC Extragalactic Database - NED
• NASA's National Space Science Data Center
• The SAO/NASA Astrophysics Data System
• SDSS Quick Look tool: SkyServer
• SIMBAD Astronomical Database
• SIMBAD Web interface, Harvard alternate
• Spacecraft Query at NASA
• Universal coordinate converter

{{Radiation astronomy resources}}