Radiation/Electromagnetics/Quiz

Electromagnetic radiation is a stand-alone lecture. It overlaps areas such as radiation astronomy, radiation chemistry, radiation biology, and radiation physics. There are aspects included in the various health sciences and medicine. It is included in the department of radiation astronomy course on the principles of radiation astronomy.

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1 Quiz
2 Hypotheses
3 See also
4 External links

Quiz

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1 Which of the following is not a characteristic of the X-ray continuum?

	Bragg peaks
	may arise from an X-ray jet
	may arise from the coronal cloud of an accretion disc
	a power-law spectrum
	a thermal emission at the lowest energies

2 Tarapacaite is a natural mineral pigment composed of what likely source of yellow?

3 True or False, Super soft X-ray sources are in most cases only detected below 0.5 keV.

	TRUE
	FALSE

4 Ashen light is involved in which of the following?

	earthshine
	glow of the bright part of the lunar disk
	light from different parts of Earth are mixed together
	mimics the Earth as a single dot
	neutron astronomy
	X-ray astronomy

5 True or False, As gamma rays are defined to be radiation emitted from radionuclides, there are no radionuclides that emit X-rays.

	TRUE
	FALSE

6 On what date was GRB 970228 discovered?

	August 22, 1997
	February 28, 1997
	September 7, 2002.28
	1982 the 20th between July and September
	2009 July 22nd and 8 hours
	February 14, 2014

7 True or False, Submillimeter radiation ranges from 100 µm to 1 mm.

	TRUE
	FALSE

8 Imaging brown dwarfs involves which of the following:

	far-infrared (submillimeter) observations at 350 microns
	neutrino detection
	heating of the nearby gas and dust
	near-infrared covering 1.3 and 2.2 microns
	infrared covering 4.5 and 8.0 microns

9 Red ochre is a natural pigment composed of what likely source of red?

10 Which of the following are or likely to be relatively common red minerals?

	crocoite
	rhodolite
	cinnabar
	hematite
	eudialyte

11 Yes or No, Clouds are a form of radiation because they have a temperature gradient.

	Yes
	No

12 Complete the text:

An aerometeor is a

unit of air traveling or

through an atmosphere.

13 Which of the following is associated with red radiation?

	900 nm
	300 THz
	longer wavelengths than those of visible light
	620 - 750 nm
	1 mm

14 True or False, Hydrogen has an emission line in the yellow.

	TRUE
	FALSE

15 Complete the text:

Terahertz radiation refers to electromagnetic waves propagating at

in the

range.

16 Light at the extreme red end of the visible spectrum, between red and infra-red light is called

light.

17 Yes or No, Some cosmic-ray observatories also look for high energy gamma rays and X-rays.

	Yes
	No

18 Which of the following is not characteristic of a neutrino?

	neutrinos are affected by the weak nuclear force
	produced by a positron annihilating an electron
	a decay product of a neutron
	produced by the near surface fusion on the Sun
	may have a mass
	comes in mutable varieties

19 True or False, Boron has an emission line in the yellow.

	TRUE
	FALSE

20 Complete the text:

and

radiation are best absorbed by atoms with heavy nuclei.

21 True or False, The distribution of gamma-ray bursts is tetratropic.

	TRUE
	FALSE

22 Beta rays, or beta particles, are more penetrating than what other Greek letter designated rays or particles?

23 True or False, Radiation is an action or process of throwing or sending out a traveling ray in a line, beam, or stream of small cross section.

	TRUE
	FALSE

24 Complete the text:

A filter of type F588N allows the transmission of

rays.

25 True or False, Bremsstrahlung radiation may be a source of the yellow continuum.

	TRUE
	FALSE

26 Which of the following are cold dark matter gamma rays?

	expected signal comparable to background
	annihilation radiation
	a pronounced cosmic-ray halo
	difficult to separate from a dark halo
	dwarf spheroidals
	weakly interacting massless particles

27 True or False, Microwave radiation ranges from 1 micron to 1 mm.

	TRUE
	FALSE

28 Submillimeter radiances can be matched by models which include ice particles of?

29 Complete the text:

Beta particles are high-energy, high-speed

or positrons emitted by certain types of

nuclei such as

-40.

30 Using HIFI instrument aboard the Herschel Space Observatory, the first detection of what ion occurred on March 1 and March 23, 2010?

31 True or False, The Mauna Kea Observatories are used for scientific research across the electromagnetic spectrum from visible light to radio, and comprise the largest such facility in the world.

	TRUE
	FALSE

32 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⁺ (Zn_1-xCo_xO)

33 True or False, A delta ray is a ray of very fast positrons.

	TRUE
	FALSE

34 Which types of radiation astronomy directly observe the rocky-object surface of Venus?

	meteor astronomy
	cosmic-ray astronomy
	neutron astronomy
	proton astronomy
	beta-ray astronomy
	neutrino astronomy
	gamma-ray astronomy
	X-ray astronomy
	ultraviolet astronomy
	visual astronomy
	infrared astronomy
	submillimeter astronomy
	radio astronomy
	radar astronomy
	microwave astronomy
	superluminal astronomy

35 True or False, Microwave radiation ranges from 1 m to 1 mm.

	TRUE
	FALSE

36 Which of the following are X-ray astronomy phenomena that may be associated with the Earth?

	lightning
	Van Allen radiation belts
	electrons striking the ionosphere
	the geocorona
	ice cores
	meteorites
	diffuse X-ray background
	hurricanes

37 A method used to count the number of X-rays of a specific wavelength diffracted by a crystal?

38 The reason in principle that your automobile is not detecting submillimeter rays is

	it is sitting on top of the Earth's crust below a thick atmosphere
	it is low on fuel
	those components that may respond to submillimeter rays are not hooked up to needed counting electronics
	the top is not down
	the Moon is visible
	the Sun is behind the clouds

39 Which of the following is not a characteristic of X-radiation?

	throwing a beam
	a stream of charged or neutral rays
	calculating the energy of a beam
	sending out a traveling ray
	a secondary-object hazard

40 Complete the text:

A three-color (850, 650, and 350 GHz) single-pixel

system has been installed on the

Submillimeter Telescope (ASTE) and several massive star forming regions were mapped to derive submillimeter SEDs of these sources.

41 True or False, On the whole the emission strength is low in the submillimeter for astronomical objects.

	TRUE
	FALSE

42 Complete the text:

The submillimeter emission from a cometary

can be estimated under the assumption of thermal

43 Yes or No, X-rays span approximately three decades in wavelength, frequency, and energy.

	Yes
	No

44 The number and energy of the X-rays emitted from a specimen can be measured by an?

45 True or False, An aurora seen from Australia may be a blue radiation source.

	TRUE
	FALSE

46 High-energy particle acceleration during an energetic solar flare may involve which of the following at submillimeter wavelengths:

	a rapid rise in temperature
	a gradual, long-lasting component
	large apparent source sizes
	synchrotron emission
	a magnetic field strength of ≥ 200 Gauss
	a close correlation in time and space of radio emission with pion production

47 True or False, The planet Saturn exhibits a pale yellow hue due to ammonia crystals in its upper atmosphere.

	TRUE
	FALSE

48 Which of the following emission/absorption phenomena are associated with radiation astronomy?

	helium lines at 501 and 505 nm
	the strong C₂ (1,2) band
	nitrogen emission in plasmas at 566.934 nm from N VIII
	helium emission line at 5876 Å
	neutral iron line at 526.96 nm
	calcium yellow line at 569.4 nm

49 Yes or No, Radio rays have wavelengths of one millimeter or more.

	Yes
	No

50 Using the equation ${\frac {c2}{\lambda T}}{\frac {1}{e^{\frac {c2}{\lambda T}}-1}}e^{\frac {c2}{\lambda T}}-5=0$ what temperature corresponds approximately to a Planckian peak wavelength of 580 nm?

	5140 K
	5800 K
	5170 K
	6000 K
	5870 K
	5250 K

51 True or False, The Earth's atmosphere does not transmit yellow radiation between 470 and 590 nm in wavelength because of water vapor.

	TRUE
	FALSE

52 Which of the following are characteristic of the telluric mercury green line?

	546.1 nm
	light pollution at the Calar Alto observatory
	a decay product of uranium
	mercury vapour lamps
	tropospheric scattering
	y-band of the ubvy Strömgren photometric system

53 True or False, The Earth's atmosphere does not transmit infrared radiation between 6 and 7 microns in wavelength because of water vapor.

	TRUE
	FALSE

54 Complete the text:

The three key parameters of a

waveform are its

and its

55 True or False, Inverse Compton scattering allows low energy electromagnetic radiation to become high energy electromagnetic radiation.

	TRUE
	FALSE

Hypotheses

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Main resource: Hypotheses

The electromagnetic radiation doses received by NASA and RSA astronauts probably are not the cause of the medical symptoms of spaceflight.
Gamma rays may hold the key to conversion of electromagnetic radiation back into matter.