Flashcards - Astronomy Test #1 (Ch. 0,1,2,and 3) ~ HotNews

Answers for The study and analysis of light according to its component wavelengths is called. Ask for homework help with other questions and get the answer fast!For example, if a star is moving toward us, its lines will be observed at shorter wavelengths, which is called "blueshifted". If the star is moving away from us, the lines will appear at longer wavelengths, which is called "redshifted". This is called "Doppler shift."Most of the light passes through glass but none of the light passes through metal. Most of the light is absorbed by glass but none of the light is absorbed by metal. Carla did an experiment by placing a piece of smooth, clear glass and a piece of smooth, black stone under a lamp for twenty minutes.For example, when white light is passed through a prism, a spectrum of colors results. This phenomenon occurs because the different wavelengths are refracted in the prism to different degrees. Accordingly, the resultant beam of light is split according to wavelength, or color.The second component of a spectroscope is the diffraction grating. This determines both the range of wavelengths from light as well as the optimal resolution, or how sharp the image will be

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The study and analysis of light according to its component wavelengths is called We will write a custom essay specifically for your for only $16.05 $11/page Learn More ARefraction of Light. Refraction, or bending of light, occurs as light passes from one medium into another medium with a different refractive index.Refraction is an important characteristic of lenses, allowing them to focus a beam of light onto a single point, and is also responsible for a variety of familiar phenomena, such as the apparent distortion of objects partially submerged in water.As shown on the right, the component colors of the visible portion can be separated by passing sunlight through a prism, which acts to bend the light in differing degrees according to wavelength. Electromagnetic radiation such as visible light is commonly treated as a wave phenomenon, characterized by a wavelength or frequency.Wavelengths, frequencies, and energies of light span a wide range; the entire range of possible values for light is called the electromagnetic spectrum. We are mostly familiar with visible light, which is light having a wavelength range between about 400 nm and 700 nm.

Properties of Light Flashcards | Quizlet

The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as a dispersive element. The diffraction grating disperses the light into a linear spectrum of its component wavelengths, which is then directed, in whole or in part along the light path of the instrument.What is the visible light spectrum? The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.Light, or Visible Light, commonly refers to electromagnetic radiation that can be detected by the human eye. The entire electromagnetic spectrum is extremely broad, ranging from low energy radio waves with wavelengths that are measured in meters, to high energy gamma rays with wavelengths that are less than 1 x 10-11 meters. ElectromagneticThe Value of Stellar Spectra. When Newton described the laws of refraction and dispersion in optics, and observed the solar spectrum, all he could see was a continuous band of colors. If the spectrum of the white light from the Sun and stars were simply a continuous rainbow of colors, astronomers would have little interest in the detailed study of a star's spectrum once they had learned itsThe light from the stuff between the stars allows astronomers to study the interstellar medium (ISM). This tells us what type of stuff fills the space between the stars. Space is not empty! There is lots of gas and dust between the stars. Spectroscopy is one of the fundamental tools which scientists use to study the Universe. Use Hera. to

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Chapter 3: Question 31What drawback do refractor telescopes have that reflectors don't?A. chromatic aberrationB. dangerous seeingC. diffraction restricted resolutionD. light loss from secondary elementsE. atmospheric blurring

A. Chromatic AberrationChromatic Aberration: when light is separated into its component colorsDiffraction Limited Resolution: for light, of any given wavelength, huge telescopes produce much less diffraction than small ones

Chapter 3: Question 30Which of the following is NOT a explanation why to use a reflecting telescope moderately than a refractor? A. Lenses are subject to chromatic aberration.B. Lenses soak up light, whilst mirrors do not.C. Heavy lenses, which will handiest be supported at their edges, generally tend to deform under their own weight. D. A lens will have to have two precision surfaces; a mirror wishes only one.E. Lenses are harder to focus than mirrors.

Chapter 3: Question 11The light-gathering ability of a telescope is maximum dependent on the diameter of its number one goal. True or False?True False

True

Chapter 3: Question 13A telescope with an 8-inch replicate will gather two times as a lot light as one with a 4-inch mirror.True or False?True False

False

Chapter 3: Question 14The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes lens. True or False?True False

True

Chapter 3: Question 15Radio telescopes have poorer angular answer than optical telescopes as a result of radio waves have a for much longer wavelength than optical waves. True or False?True False

True

Chapter 3: Question 39What is the answer of a telescope?A. its skill to see very faint gadgets its ability to separate light into its component colors for analysisB. its skill to distinguish two adjacent objects shut in combination in the skyC. its ability to center of attention extra than just visual light for imagingD. its ability to make distant gadgets seem much closer to us

Chapter 3: Question 42Green light has a shorter wavelength than orange light. In a Five inch telescope, inexperienced light will...A. permit dimmer stars to be seen.B. supply worse angular solution than orange light.C. come to the similar actual focus as orange light.D. cut back the results of atmospheric turbulence.E. provide higher angular resolution than orange light.

Chapter 3: Question 18The opacity of the surroundings is partly corrected by means of adaptive optics. True or False?True False

False

Chapter 3: Question 43What drawback does adaptive optics proper?A. the light pollution of city areasB. defects in the optics of the telescope, reminiscent of the authentic Hubble mirrorC. the opacity of the Earth's surroundings to some wavelengths of lightD. turbulence in the Earth's setting that creates twinklingE. chromatic aberration due to use of just a single lens goal

Reflecting Telescopes characterisitics and examples:

-World's biggest telescope-Most commonly utilized by execs astronomers today-Ex: The Hubble Space Telescope

Refracting Telescopes characteristics and examples:

-Incoming light passes thru glass-Very large telescopes turn out to be "top-heavy"-The global's greatest is 1-meter in diameter-Ex: Galileo's Telescopes

Chapter 3: Question 20Optical telescopes are generally used simplest at night time, however radio telescopes can be utilized day or evening. True or False?True False

True

Chapter 3: Question 21The Earth's environment is the significant factor limiting the use of ground-based radio telescopes. True or False?True False

False

Chapter 3: Question 22Optical interferometry is than radio interferometry. True or False?True False

False

Chapter 3: Question 44What is true of radio telescopes?A. They are maximum sensitive to the opacity of the ozone layer.B. They have better angular resolution than a reflector.C. They are the smallest, most compact telescopes.D. They have poorer angular solution than a refractor of the similar dimension.E. They can only be used above the atmosphere.

Chapter 3: Question 46In astronomy, an interferometer can be utilized to...A. build up the sensitivity of infrared telescopes to longer wavelengths.B. lower the results of light pollution in getting darker sky backgrounds.C. accelerate the processing of CCD photographs.D. enhance the angular resolution of radio telescopes.E. yield better seeing conditions with optical telescopes.

Chapter 3: Question 28Galaxies glance the same whether viewed in visual or X-ray wavelengths. True or False?True False

False

Chapter 3: Question 27The Compton GRO was once the first telescope used for our exploration of high-energy astronomy. True or False?True False

False

Chapter 3: Question 26The mirrors for X-ray telescopes are the same form as the ones of optical reflectors. True or False?True False

False

Chapter 3: Question 25Due to our ozone layer, ultraviolet astronomy must be achieved from area. True or False?True False

True

Chapter 3: Question 24Like radio and optical astronomy, infrared astronomy is simply done with ground-based telescopes. True or False?True False

False

Chapter 3: Prelecture Question 14Which of the following regions of the elctromagnetic spectrum is useful for learning distant galaxies? A. Radio wavesB. Visible lightC. Infrared lightD. Ultraviolet lightE. All of the above

Chapter 3: Question 50Which of the following is these days supplying high solution X-ray images from space?A. ROSATB. HEAO-2C. EinsteinD. COBEE. Chandra

Conceptual Self-Test 3.02The time period seeing is used to describe how faint an object will also be detected through a telescope. True or False?True False

False

Conceptual Self-Test 3.03One of the primary advantages of CCDs over photographic plates is the former's high efficiency in detecting light. True or False?True False

True

Conceptual Self-Test 3.04Radio telescopes are large in part to enhance their angular resolution, which is poor as a result of of the long wavelengths at which they're used to follow the skies. True or False?True False

True

Conceptual Self-Test 3.05Infared astronomy can most effective be carried out from house. True or False?True False

False

Conceptual Self-Test 3.06Gamma-ray telescopes make use of the identical elementary design that optical tools use. True or False?True False

False

Conceptual Self-Test 3.07Because gamma rays have very brief wavelengths, gamma-ray telescopes can reach extremely high angular answer. True or False?True False

False

Conceptual Self-Test 3.08The primary reason that the majority skilled analysis telescopes are reflectors is that...A. their pictures are inverted.B. massive mirrors are more straightforward to build than huge lenses.C. mirrors produce sharper photographs than lenses do.D. they don't suffer from the effects of seeing.

Conceptual Self-Test 3.10The primary reason why professional observatories are constructed on the perfect mountaintops is to...A. give a boost to chromatic aberration.B. scale back atmospheric blurring.C. be above the rain clouds.D. get away from city lights.

Conceptual Self-Test 3.11When more than one radio telescopes are used for interferometry, resolving power is maximum improved by way of...A. expanding the number of telescopes in a given space.B. the electrical power provided to every telescope.C. the diameter of each telescope.D. the distance between telescopes.

Conceptual Self-Test 3.12The Spitzer Space Telescope (SST) is stationed a long way from Earth because...A. Earth is a warmth source and the telescope will have to be saved very cool.B. the telescope is delicate to electromagnetic interference from terrestrial radio stationsC. this will increase the telescope's field of view.D. doing so avoids the obscuring effects of Earth's setting.

Conceptual Self-Test 3.13The easiest approach to study young stars hidden behind interstellar mud clouds can be to use...A. X-rays.B. blue light.C. infrared light.D. ultraviolet light.

Conceptual Self-Test 3.14 VISResolution is sharpest when the ratio of wavelengths to telescope measurement is...A. largeB. SmallC. close to 1D. none of these

Conceptual Self-Test 3.15 VISThe highest frequency wave through which to study the sizzling (million-kelvin) gasoline discovered amongst the galaxies in the Virgo cluster could be... A. in X rays.B. in gamma rays.C. in the infrared rays.D. at radio frequencies.

Chapter 1: Question 16In Ptolemy's geocentric fashion, retrograde movement occurs when the planet is closest to us, on the inside of portion of...A. ecliptic.B. epicycle.C. equant.D. ellipse.E. deferent.

Chapter 1: Question 14In Ptolemy's geocentric type, the planet's motion along its deferent is all that is wanted to perceive retrograde motion. True or False?True False

False

Chapter 1: Question 22Which of those was once NOT noticed telescopically by way of Galileo? A. Four moons round JupiterB. stellar parallaxC. craters and mare on the MoonD. sunspotsE. Venus' phase cycle

Chapter 1: Question 12Galileo's observations of the complete phase cycle of Venus proved that Ptolemy's epicycles could no longer be proper in maintaining Venus between us and the Sun. True or False?True False

True

Vocabulary in Context: Kepler's Planetary Orbits1. Earth is situated at one __ of the Moon's orbit.2. According to Kepler's 2d law, Jupiter shall be touring maximum slowly around the Sun when at __.3. Earth orbits in the form of a/an __ around the Sun.4. The mathematical form of Kepler's 3rd regulation measures the era in years and the __ in astronomical units (AU).5. According to Kepler's 2nd legislation, Pluto can be touring quickest round the Sun when at __.6. The extent to which Mars' orbit differs from an ideal circle is called its __.

1.Focus2.Aphelion3.Ellipse4.Semi-major Axis5.Perihelion6.Eccentricity-Aphelion: biggest distance from the Sun-Perihelion: level of closest means to the Sun-Eccentricity: how a long way off an orbit is from an elliptical path

Ranking Task: Kepler's Third Law of Planetary Motion1. Planets transfer fastest when they're at the __ (proper side).2. Planets move slowest when they are at the __ (left side).3. Planetary Orbits cross __.4. Does mass impact orbital periods?5. Kepler's Third Law formulation is __.

1. Aphelion2. Perihelion3. Counter-clockwise4. No5. P^2 (in Earth)=A^3 (in AU)-P=orbital period-A=Semimajor axis

Ranking Task: Kepler's Second Law1. Kepler's second legislation states: an imaginary line connecting the Sun to any planet sweeps out __of the ellipse in __.2. When a planet is ___ to the Sun it moves ___ than when ___ away.3. When an object is __ to the Sun then, it covers ___ than when it was once ___.

1. equal areas/ equivalent periods of time2. closest/sooner/farther3. close/greater distance/farther away

Chapter 1: Question 8Kepler found the orbits of planets are ellipses, now not circles. True or False?True False

True

Chapter 1: Question 25Tycho Brahe's contribution to Kepler's Laws of Planetary Motion had been...A. the proper clarification of lunar stages.B. his detailed and accurate observations of the planets' positions.C. his observations of Jupiter's moons.D. a mathematical explanation of epicycles.E. an actual lunar calendar.

Chapter 1: Question 3According to Newton's Second Law, should you double the pressure acting on a body, the acceleration will double. True or False?True False

True