Charges/Circuits/Astronomy/Quiz

Circuit astronomy is a lecture as part of the radiation astronomy department series on charge in the universe.

You are free to take this quiz based on circuit astronomy 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 and  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.

This quiz may need up to an hour to take and is equivalent to an hourly.

Enjoy learning by doing!

Quiz
{Yes or No, Van Allen radiation belt electrons are constantly removed by collisions with atmospheric neutrals, losses to the magnetopause, and outward radial diffusion. + Yes - No
 * type=""}

{Complete the text: A composite { electron density (i) } spectrum is approximately a { power (i) } law over at least the ≈ 5 decade wavenumber range 10-13 m-1 < wavenumber < 10-8 m-1 and that may extend to { higher (i) } wavenumbers.
 * type="{}"}

{True or False, Interstellar scintillation is fluctuations in the amplitude and phase of radio waves caused by scattering in the interstellar medium. + TRUE - FALSE
 * type=""}

{Complete the text: Match up the detector component/characteristic letter with each of the possibilities below: Optical bench - A Focal length - B CCD - C Coded aperture - D Grazing incidence - E Modulator - F Collimator - G Normal incidence - H varying amplitude, phase, or frequency { F (i) }. a platform used to support systems { A (i) }. narrows a beam { G (i) }. gold mirrors { E (i) }. a measure of how strongly a system converges or diverges { B (i) }. a device for the movement of electrical charge { C (i) } reflective multilayer optics { H (i) }. a flat grille { D (i) }.
 * type="{}"}

{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
 * type=""}

{When the Earth is viewed from space using X-ray astronomy what characteristic is readily observed? - the magnetic north pole - the Hudson Bay meteorite crater - the South Atlantic Anomaly - the Bermuda Triangle - solar positron events + electrons striking the ionosphere
 * type=""}

{True or False, Electrons in the Earth's magnetosphere are energized by neutral particles from the Sun. - TRUE + FALSE
 * type=""}

{A device that narrows a beam of particles or waves is a? { collimator (i) }
 * type="{}"}

{Which of the following is likely to be in a control group for assessing a radiation detector? + very high peak to background (> 1000) for known radiation sources + a minimum number of electronic components from the respondent material to the output or image - a liquid nitrogen dewar + easily shielded by neutral material, or anticoincidence material - buried deep underground, under ice, or under water + a wide temperature range for respondent material stability
 * type="[]"}

{The slowing down of a projectile ion due to the inelastic collisions between bound electrons in the medium and the ion moving through it? { electronic stopping power (i) }
 * type="{}"}

{Complete the text: To "narrow" can mean to { cause (i) } the spatial { cross section (i) } of the beam to become { smaller (i) } limit.
 * type="{}"}

{Complete the text: The three key parameters of a { periodic (i) } waveform are its { amplitude|volume (i) }, { phase|timing (i) } and its { frequency|pitch (i) }.
 * type="{}"}

{Complete the text: With the modulation collimator, the amplitude ( { intensity (i) } ) of the incoming { X-rays (i) } is reduced by the presence of { two or more (i) } diffraction gratings of { parallel wires (i) } that block or greatly reduce that portion of the { signal (i) } incident upon the wires.
 * type="{}"}

{Complete the text: The multigrid collimator has the additional { grid (i) } inserted at a specified { intermediate (i) } position between the two grids, { aligned (i) } approximately { parallel (i) } to them, and { positioned (i) } and rotated so that each third { wire (i) } lies in a plane defined by a wire in the outer grid and a wire in the { inner (i) } grid.
 * type="{}"}

{Complete the text: The { collimating (i) } effects of the grid { enclosure (i) } or external metal { slats (i) } determine the envelope for the { triangular (i) } transmission peaks.
 * type="{}"}

{True or False, Wolter Type I X-ray optics uses three reflections to focus the incoming X-rays. - TRUE + FALSE
 * type=""}

{Fast, short duration electrical transients in voltage, current, or transferred energy in an electrical circuit? { spike (i) }
 * type="{}"}

{True or False, Wolter Type II X-ray optics uses two reflections to focus the incoming X-rays. + TRUE - FALSE
 * type=""}

{The elastic collisions between the projectile ion and atoms in the detector involving the interaction of the ion with the nuclei in the detector material? { nuclear stopping power (i) }
 * type="{}"}

{True or False, Wolter Type III X-ray optics uses one reflection to focus the incoming X-rays. - TRUE + FALSE
 * type=""}

{Which of the following is not a characteristic of X-ray optics? - grazing incidence mirrors - tungsten-silicon multilayer coatings - nested mirrors - an angular resolution + X-ray lens
 * type=""}

{True or False, To reflect at the 79 keV level, glass layers are multi-coated with W/SiC. - TRUE + FALSE
 * type=""}

{Radiotoxic alpha radiation emitters which are expensive? { radium | radon (i) } and { radon | radium (i) }
 * type="{}"}

{True or False, A sunrise may be detected by listening for bird song. + TRUE - FALSE
 * type=""}

{The first source of odor when the terminator passes at the beginning of daylight may be which of the following? - the Sun - a meteorite impact + flowers that open their blooms at sunrise - a late-summer rainstorm - the Moon
 * type=""}

{An energy range in a solid where no electron states can exist? { energy gap | band gap | bandgap (i) }
 * type="{}"}

{True or False, A professional astronomer holding a digital camera in their hands while working on the International Space Station is a primary astronomical visual source detector. + TRUE - FALSE
 * type=""}

{Substances with large band gaps are generally? { insulators (i) }
 * type="{}"}

{The reason in principle that your automobile is not detecting X-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 X-rays are not hooked up to needed counting electronics - the top is not down - the Moon is visible - the Sun is behind the clouds
 * type=""}

{A random fluctuation in an electrical signal? { noise (i) }
 * type="{}"}

{A device that detects and responds in a distinctive manner? { sensor (i) }
 * type="{}"}

{True or False, The Hubble Space Telescope currently uses the Wide Field Planetary Camera (PC-2) with its F492M filter among others for green astronomy. - TRUE + FALSE
 * type=""}

{The average energy loss of the particle per unit path length? { stopping power (i) }
 * type="{}"}

{True or False, The Hβ emission line does not appear when the F492M filter is used on the Hubble Space Telescope because its wavelength is 486.1 nm. - TRUE + FALSE
 * type=""}

{A function of the form:


 * $$f(x) = a e^{- { \frac{(x-b)^2 }{ 2 c^2} } }$$

for some real constants a, b, and c? { Gaussian | Gaussian peak (i) }
 * type="{}"}

{For the above function, the real constant a of the curve's peak? { height (i) }
 * type="{}"}

{For the above function, the real constant b of the curve's peak? { position of the center of the peak | center peak position (i) }
 * type="{}"}

{For the above function, the real constant c which controls the width of the curve? { standard deviation (i) }
 * type="{}"}

{True or False, The PC-1 F502N is centered at 501.85 nm with a band pass of 2.97 nm. + TRUE - FALSE
 * type=""}

{Complete the text: The { delta-ray|delta ray (i) } tracks in emulsion chambers have been used for { direct (i) } measurements of { cosmic-ray|cosmic ray (i) } nuclei above { 1 TeV/nucleon (i) } in a series of balloon-borne experiments.
 * type="{}"}

{Which of the following is involved in planetary astronomy more so than planetary science? + the occurrence of blue rock types on the surface of rocky objects - the Earth and other rocky objects have a green mineral containing mantle - checking equations about complex systems + the advantages of a 559 nm band pass - digging holes in the surface of Mars + surface temperatures low enough to produce methane lakes
 * type="[]"}

{Natural X-ray sources emit, reflect, fluoresce, absorb, or? { transmit (i) }
 * type="{}"}

{The time after each event during which the system is not able to record another event? { dead time | deadtime (i) }
 * type="{}"}

{A device capable of registering a specific substance or physical phenomenon? { detector (i) }
 * type="{}"}

{The minimum voltage that causes a portion of an insulator to become electrically conductive? { breakdown voltage (i) }
 * type="{}"}

{Complete the text: The hardware setup also defines key experimental parameters, such as { source-detector distance (i) }, solid { angle (i) } and detector { shielding (i) }.
 * type="{}"}

{Complete the text: Since the energy of a thermal { neutron (i) } is relatively low, { charged (i) } particle reaction is { discrete (i) }; i.e., essentially { monoenergetic | mono-energetic (i) } while other reactions such as { gamma (i) } reactions will span a broad energy { range (i) }, it is possible to { discriminate (i) } among the sources.
 * type="{}"}

{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) }.
 * type="{}"}

{True or False, A Faraday cup is a metal conductive cup designed to catch charged particles in vacuum. + TRUE - FALSE
 * type=""}

{True or False, A gas detector is a device which detects the presence of various X-rays within an area. - TRUE + FALSE
 * type=""}

{True or False, The presence of a liquid may be detected by using S-waves. + TRUE - FALSE
 * type=""}

{True or False, The Sun may be directly detected using radar astronomy. - TRUE + FALSE
 * type=""}

{True or False, The wheel of the OSO 5 satellite carried a thallium iodide crystal scintillator. - TRUE + FALSE
 * type=""}

{True or False, Call every lab you know, tell them to put the spectrometers on the roof and calibrate them for gamma-rays. - TRUE + FALSE
 * type=""}

{Complete the text: For the equation $$ {1 \over \lambda} = R \left( {1 \over (n^\prime)^2} - {1 \over n^2} \right) \qquad $$ n is the { initial energy level (i) }, n' is the { final energy level (i) } and R is the { Rydberg constant (i) } in units of inverse { meter|meters (i) }.
 * type="{}"}

{An optical device that measures the position of a star using a photocell is a? { star tracker|startracker (i) }
 * type="{}"}

{A device that senses the direction to the Earth is? { an earth sensor|earth sensor|earthsensor (i) }
 * type="{}"}

{A device that senses the direction to the Sun is a? { sun sensor (i) }
 * type="{}"}

{The name of a neutrino detector residing 2.5 km under the Mediterranean Sea off the coast of Toulon, France, is? { ANTARES|Antares (i) }
 * type="{}"}

{The name of a neutrino detector under the ice at the Amundsen-Scott South Pole Station in Antarctica is? { IceCube (i) }
 * type="{}"}

{To provide a cooling effect on the atmosphere surrounding the observatory building and eliminate ground heat radiation, put the detector housing in? { open waters|lake|open waters of a lake (i) }
 * type="{}"}

{An argon-37 atom is converted by a neutrino by the charged current interaction from what atom? { chlorine-37|37Cl (i) }
 * type="{}"}

{A gallium detector design converts incoming neutrinos to what element? { germanium (i) }
 * type="{}"}

{A device that controls the output of a power supply to match an input signal shape but with a larger amplitude is an? { amplifier|electronic amplifier|pulse amplifier (i) }
 * type="{}"}

{A solid state integrated circuit modulator that uses external feedback to control its transfer function or gain is what kind of modulator? { differential|differential amplifier (i) }
 * type="{}"}

{Complete the text: An optical instrument that detects light from the { limb (i) } of the Earth's atmosphere, that is at the { horizon (i) } is an horizon { sensor (i) }.
 * type="{}"}

{Complete the text: A horizon sensor used to sense the direction to the { Earth's|earth's (i) } center coupled with a { gyro (i) } to sense rotation about an axis normal to the orbit plane is an { orbital (i) } gyrocompass.
 * type="{}"}

{Complete the text: Condensed noble gases, most notably liquid { xenon|argon (i) } and liquid { argon|xenon (i) }, are excellent radiation detection { media (i) }.
 * type="{}"}

{Complete the text: A white beam source focused on a sample, upon striking the sample has photons whose energy matches the { energy (i) } gaps { absorbed (i) } in order to excite the molecules of the sample, while the other photons transmit unaffected and give the sample the { complementary (i) } color.
 * type="{}"}

{Complete the text: The electronic band structure of a solid describes those ranges of { energy (i) } called energy { bands (i) } that an electron within the sold may have, called { allowed (i) } bands and ranges of energy called band gaps or { forbidden (i) } bands, which it may not have.
 * type="{}"}

{True or False, The density of states describes the number of states surrounding Afghanistan. - TRUE + FALSE
 * type=""}

{True or False, The number of states per interval of energy that are available to be occupied by positrons is called density of states. - TRUE + FALSE
 * type=""}

{True or False, The interval of energy at each energy level available for occupation by electrons is the density of states. - TRUE + FALSE
 * type=""}

{True or False, The density of states is the number of states per interval of energy at each energy level that are available to be occupied by electrons. + TRUE - FALSE
 * type=""}

{True or False, The density distributions of a solid or unit of condensed matter involving more than atoms or molecules is not discrete like a spectral density but continuous. + TRUE - FALSE
 * type=""}

{True or False, Local variations, most often due to distortions of the original system, are often called local density of states. + TRUE - FALSE
 * type=""}

{Complete the text: Match up the type of cosmic-ray detector with each of the possibilities below: visible tracks - A diffusion cloud chamber - B bubbles - C a grid of uninsulated electric wires - D similar to the Haverah Park experiment - E fluorescence detectors - F spark chamber { D (i) }. continuously sensitized to radiation { B (i) }. Pierre Auger Observatory { F (i) }. bubble chamber { C (i) }. Cherenkov detector { E (i) } expansion cloud chamber { A (i) }.
 * type="{}"}

{Complete the text: From the list of components below, construct a detector starting with incoming radiation: incoming radiation { G (i) }. high atomic number deflecting element { F (i) }. optical bench { C (i) }. a system convergence { D (i) }. modulator { E (i) } a beam narrower { B (i) }. a device for the movement of electrical charge { A (i) } focal length - D gracing incidence - F CCD - A a platform used to support systems - C aperture - G collimator - B device varying amplitude, phase, or frequency - E
 * type="{}"}

{True or False, The resolution of a detector is its separation into constituent parts. - TRUE + FALSE
 * type=""}

{For web colors the RGB decimal code (0 255 0) is what color? { lime (i) }
 * type="{}"}

{True or False, In hexadecimal code, a hex triplet, #008000 or 00 80 00 is green. + TRUE - FALSE
 * type=""}

{Which of the following is not a prominent feature associated with the greenness response? - M cone cells - a green light source + L cones - "bluish green" 493-498 nm - "yellowish green" 530-559 nm - "yellow green" 559-570 nm
 * type=""}

{True or False, The resolution of a detector is the degree of fineness of its separation of incoming radiation. + TRUE - FALSE
 * type=""}

{The electron and ion currents of the cosmogonic shadow effect are given by { Mendis (i) } et al., 1984.
 * type="{}"}

{What are some of the characteristics of Jovian electrons? + hard spectrum + Jovian electrons near Earth are on their way to the Sun + an energy power law + flux increases with 27 day periodicities - at 1 AU, flux decreases exhibit a short-term modulation of 13 minutes - come in mutable varieties
 * type="[]"}

Hypotheses

 * 1) A sense-around system needs to incorporate detection of all forms of radiation.