Chapter4.Telescopes - Telescopes Chapter 4 1 Functions of a...

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1 Telescopes Chapter 4
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2 Functions of a Telescope Functions of a Telescope gathering light (information) – the bigger the objective, the larger than quantity of light resolving power – the ability to see details; the larger than objective, the finer the detail magnification – focal length of objective/focal length of eyepiece (least important function)
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3 A larger telescope provides a brighter ( not bigger ) image
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4 Resolving Power – limited by diffraction
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5 poor resolving power better resolving power
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6 Angular Resolution adds a lot to the picture! Images of the galaxy M100 from the Hubble Space Telescope, before and after the fix – see the difference in resolution!
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7 Refraction
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8
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9
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10 Refractors
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11 Two of Galileo’s telescopes
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12 Yerkes refractor
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13 Refractors are not perfect Chromatic aberration – light of different colors reaches different focus points in a refractor An example of chromatic aberration
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This note was uploaded on 04/17/2008 for the course ASTRO 1504 taught by Professor Tabak during the Spring '08 term at Youngstown State University.

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Chapter4.Telescopes - Telescopes Chapter 4 1 Functions of a...

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