(a) Calculate the focal ratio. (b) Calculate the minor and major axes of the minimum size of secondary mirror that should be used with this telescope. (c) What would be the magnification when used with a 15 mm eyepiece?
(a) Calculate the focal ratio. (b) Calculate the minor and major axes of the minimum size of secondary mirror that should be used with this telescope. (c) What would be the magnification when used with a 15 mm eyepiece?
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Transcribed Image Text:(a) Calculate the focal ratio.
(b) Calculate the minor and major axes of the minimum size of
secondary mirror that should be used with this telescope.
(c) What would be the magnification when used with a 15 mm eyepiece?
Transcribed Image Text:A Newtonian telescope has a mirror diameter of 300 mm and a focal
length of 1500mm. The tube has an external diameter of 330mm and the
focal plane is 40mm outside the tube.
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