Review for chapter 5 test- Telescopes (Astronomy) – Flashcards
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A refracting telescope is subject to chromatic _______.
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Abberation
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A refracting telescope uses _______ to form an image.
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Lenses
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A reflecting telescope uses _______ to form an image.
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Mirrors
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Linking separate telescopes so they act as one telescope producing more detailed images
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Inferometry
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Light is described as a particle like a photon and as a _____
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Wave
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Two types of optical telescopes
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Refracting, reflecting
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Instrument for viewing the spectrum of a light source
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Spectrometer
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Distance between lens/mirror and the telescopes focus
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Focal length
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Nearly all large optical telescopes today are _______ because they do not have chromatic aberration and they are cheaper
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Reflecting
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A specialized computer chip containing a million microscopic light detectors
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Charged coupled device (CCD)
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The use of computer technology to remove distortion of the atmosphere when viewing an object through a telescope
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Adaptive optics
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As light from a star passes through a lens the light is refracted. This causes the light to separate into the color spectrum, causing a halo of color around the edge of the object as seen through a telescope. This is called what?
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Chromatic abberation
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A telescopes ability to collect light relies on what property of the lens/mirror
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Diameter
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The ability to form a clear image
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Resolving power
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Earths atmosphere turbulence making images dance and blur and stars twinkle
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Seeing
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The ability of a telescope to enlarge an image
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Magnification
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A ________ ________ is less affected by the weather, they are less expensive, they can operate 24 hours a day, and they "see" through dust clouds
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Radio telescope
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Astronomers often use space-based telescopes to collect information because earths atmosphere ________ most radiation
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Blocks
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The highest part of a wave
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Crest
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The lowest part of a wave
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Trough
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The distance between the midline of the wave and either the crest or trough
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Amplitude
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The distance between crest and crest or trough and trough
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Wavelength
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______ waves have the shortest wavelength and the highest frequency
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Cosmic
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A form of energy that exhibits wavelike behavior as it travels through space
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Electromagnetic radiation
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What rays may come from the sun, violent explosions of dying stars, and super massive black holes
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Gamma
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The spitzer space telescope and the SOFIA are ______ telescopes and must be kept cool so they don't detect their own heat
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Infrared
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The most successful telescope to orbit earth
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Hubble space telescope
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The most important power in a telescope is the ______ power
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Resolving
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In a refracting telescope the image appears to be what?
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Inverted
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Astronomers study the spectrum of a star the spectral lines are used to _______ the elements in the star
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Identify
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The color with the longest wavelengths of visible light
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Red
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Another name for the primary mirror/ lens of a telescope
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Objective
