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The Ontario high school physics. l focus is outside the lenses. The Huygens eyepiece has two plano-convexlenses (Fig. 437), the one next the eye having afocal length J that of the
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A telescope objective of focal length 1m forms a real image of the moon 0.92cm in diameter. Calculate the diameter of the moon taking its mean distance for the earth to be 38 times 10^4 km . IF the telescope uses an eyepiece of 5cm focal length. What would ...