L7 - Magnification simply depends on eye piece -Can change...

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10/15/09 Spring Tide – Sun and Moon lined up, experience higher tides (New + Full) Neap Tide – Sun and Moon at right angles cancel each other out lower tides (1 st + 3 rd Quarter) Tides lag behind due to rotation, “pulling” tides with it 3 Reasons to use Telescopes 1) Gathers more light diameter 2 2) Resolves finer detail diameter 3) Magnifies the image eyepiece Light Gathering Power (LGP) – the number of photons (particles of light) you can collect (more photons = brighter) - You can see fainter objects with more LGP - Depends on area of telescope/lens or on diameter 2 Resolution – the smallest angle you can resolve (smaller is better) Θ min = (2.52 x 10 5 λ / D) = 100 / D (arc seconds) where: Θ = minimum angle you can resolve λ = wavelength of light D = diameter (cm) of eye/lens
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Unformatted text preview: Magnification simply depends on eye piece -Can change it in and out Types of Telescopes 1) Refractor uses systems of lenses Advantages Easy to align and to keep clean (air tight) Disadvantages limit on size of lens (too large will deform), tends to be small, and chromatic aberration (makes things blurry, however, fairly easy to correct) 2) Reflector uses mirrors to focus light Advantages can support mirror from below, can make arbitrarily large, less prone to imperfections , and no chromatic aberration Disadvantages easier to get out of alignment, hard to clean (not air tight), form diffraction patterns/spikes 3) Compound combination/hybrid of refraction and reflector (has lens and mirror)...
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