For making a telescope two lenses of focal lengths 5 cm and 50 cm are to be used . Which lens will you use for objective ?
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Gilbert light experiments for boys . Fig. 174. You make a telescope into the first and your telescope ismade (Fig. 174). Focus it on adistant object. The Compound Microscope(Fig. 175) is the
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Homemade Paraboloid Diameter 114 300mm DIY Telescope Objective Lens Astronomical Newtonian Reflection Primary Mirror Parabola|Lenses| - AliExpress
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