An astronomical telescope has an objective of focal length 200 cm and an eye piece of focal length 10 cm. An observer adjusts the distance of the eye piece from the objective
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Metric Ruler. 200 Centimeters Metric Vector Ruler Stock Vector - Illustration of left, wide: 187241580
A rod is found to be 200 cm long at 40^∘ C and 200.24 cm at 100^∘C . The coefficient of cubical expansion of the material is
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