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Stars/Sun/Heliometry/Quiz

< Stars | Sun | Heliometry

Heliometry is a lecture and an article focusing on the measurements and measuring of the Sun. It is a lecture as part of the astronomy course on solar astronomy.

File:Wfullb.jpg
A visual image is shown in black and white. Credit: Big Bear Solar Observatory.

You are free to take this quiz based on heliometry 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 {{radiation astronomy resources}} template. This should give you adequate background to get 100 %.

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Quiz

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1 Complete the text:

The color of a star, as determined by the peak frequency of the visible light, depends on the temperature of the star's outer layers, including its

.

2 True or False, Boron is the third most abundant element detected on the Sun.

TRUE
FALSE

3 Complete the text:

Solar irradiance and

are measures of the amount of sunlight that reaches the Earth.

4 True or False, Hydrogen has an emission line in the cyan.

TRUE
FALSE

5 Complete the text:

Match up the structure of the Sun with the characteristic or property:
radiative zone - L
core - M
convection zone - N
dynamo - O
tachocline - P
photosphere - Q
atmosphere - R
temperature region - S
chromosphere - T
transition region - U
corona - V
heliosphere - W
diffusion rather than convection

.
bow shock

.
weakly ionized, relatively cold and dense plasma

.
X-ray emission

.
normally invisible

.
circular mass movement of plasma

.
coolest layer of the Sun

.
shear between different parts of the Sun that rotate at different rates

.
above the photosphere

.
transition from almost uniform to differential rotation

.
150 g/cm3

.
ultraviolet emission

.

6 True or False, The instrument measures the pitch angles of solar wind electrons reflected from the Moon by lunar magnetic fields.

TRUE
FALSE

7 Yes or No, The planets, with 0.13 per cent of the mass of the system, account for about 99.5 per cent of its angular momentum and no spontaneous way of so partitioning mass and angular momentum seems possible.

Yes
No

8 Complete the text:

Match up the radiation letter with each of the detector possibilities below:
Meteors - A
Cosmic rays - B
Neutrons - C
Protons - D
Electrons - E
Positrons - F
Neutrinos - G
Muons - H
Gamma rays - I
X-rays - J
Ultraviolet rays - K
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
Infrared rays - U
Submillimeter rays - V
Radio rays - W
Superluminal rays - X
multialkali (Na-K-Sb-Cs) photocathode materials

.
F547M

.
511 keV gamma-ray peak

.
F675W

.
broad-band filter centered at 404 nm

.
a cloud chamber

.
ring-imaging Cherenkov

.
coherers

.
effective area is larger by 104

.
F588N

.
pyroelectrics

.
a blemish about 8,000 km long

.
a metal-mesh achromatic half-wave plate

.
coated with lithium fluoride over aluminum

.
thallium bromide (TlBr) crystals

.
F606W

.
aluminum nitride

.
heavy water

.
18 micrometers FWHM at 490 nm

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

.
a recoiling nucleus

high-purity germanium

.
magnetic deflection to separate out incoming ions

.
2.2-kilogauss magnet used to sweep out electrons

.

9 True or False, The electron reflectometer (ER) aboard the Lunar Prospector determines the location and strength of magnetic fields from the energy spectrum and direction of electrons.

TRUE
FALSE

10 True or False, A basic unit of length for measuring the diameter of the Sun is the kilometer.

TRUE
FALSE

11 True or False, The Sun is the third most abundant entity in the solar system.

TRUE
FALSE


Hypotheses

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Main resource: Hypotheses
  1. Measuring the Sun is like measuring a ball of gas.

See also

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