User:Marshallsumter/Radiation astronomy1/Gamma rays/Quiz



Gamma-ray astronomy is a lecture and an article from the astronomy department for the course on the principles of radiation astronomy.

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Quiz
{True or False, Some cosmic-ray observatories also look for high energy gamma rays and X-rays. + TRUE - FALSE
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{Which of the following are astronomical observatory phenomena associated with gamma-ray astronomy? + 20 MeV electromagnetic radiation + the Second Small Astronomy Satellite (SAS-2) - micrometre-sized interstellar meteor particles - neutron irradiation + GRBs - meteor orbits + thorium on the Moon
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{Yes or No, The Hubble Space Telescope is currently capable of gamma-ray imaging. - Yes + No
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{Which of the following are characteristic of the first true astrophysical gamma-ray source? + a strong 2.223 MeV emission line + a solar flare + the formation of deuterium - the electron neutrino + OSO-3 + neutrons
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{True or False, The first gamma-ray telescope was carried into orbit aboard OSO 3. - TRUE + FALSE
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{Complete the text: Match up the imaging system letter with the image possibilities below: Compton Gamma Ray Observatory (EGRET) - A XMM Newton - B Fermi Gamma-ray Space Telescope - C Lunar Orbiter Gamma-Ray Spectrometer - D BATSE - E Mars Odyssey GRS - F GLAST - G Swift (X-ray/Gamma-ray mission) - H { F (i) } { B (i) }. { A (i) }. { H (i) }. { C (i) }. { G (i) }. { E (i) }. { D (i) }.
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{True or False, The distribution of gamma-ray bursts is tetratropic. - TRUE + FALSE
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{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
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{True or False, On July 2, 1967, at 14:19 UTC, the Vela 4 and Vela 3 satellites detected a flash of gamma radiation that was unlike any known nuclear weapons signatures. + TRUE - FALSE
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{Pick the characteristics of gamma-ray burst. - a strong 2.223 MeV emission line + flashes of gamma rays + associated with extremely energetic explosions + most luminous events known + can last from ten milliseconds to several minutes + followed by a longer-lived "afterglow"
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{True or False, In 2005, ESO telescopes detected, for the first time, the visible light following a short-duration burst and tracked this light for three weeks. + TRUE - FALSE
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{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
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{Complete the text: Match up the item letter with each of the possibilities below: Meteors - A Cosmic rays - B Neutrons - C Protons - D Electrons - E Positrons - F Gamma rays - G Superluminals - H X-ray jets { C (i) } the index of refraction is often greater than 1 just below a resonance frequency { H (i) }. iron, nickel, cobalt, and traces of iridium { A (i) }. Sagittarius X-1 { G (i) }. escape from a typical hard low-mass X-ray binary { F (i) }. collisions with argon atoms { B (i) }. X-rays are emitted as they slow down { E (i) }. Henry Moseley using X-ray spectra { D (i) }.
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{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 { L (i) }. F547M { Q (i) }. 511 keV gamma-ray peak { F (i) }. F675W { T (i) }. broad-band filter centered at 404 nm { N (i) }. a cloud chamber { B (i) }. ring-imaging Cherenkov { X (i) }. coherers { W (i) }. effective area is larger by 104 { H (i) }. F588N { R (i) }. pyroelectrics { U (i) }. a blemish about 8,000 km long { A (i) }. a metal-mesh achromatic half-wave plate { V (i) }. coated with lithium fluoride over aluminum { K (i) }. thallium bromide (TlBr) crystals { O (i) }. F606W { S (i) }. aluminum nitride { J (i) }. heavy water { G (i) }. 18 micrometers FWHM at 490 nm { P (i) }. wide-gap II-VI semiconductor ZnO doped with Co2+ (Zn1-xCoxO) { M (i) }. a recoiling nucleus { C (i) } high-purity germanium { I (i) }. magnetic deflection to separate out incoming ions { E (i) }. 2.2-kilogauss magnet used to sweep out electrons { D (i) }.
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{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
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Hypotheses

 * 1) Gamma rays may hold the key to conversion of electromagnetic radiation back into matter.