Small refracting spy glass telescope

Reference no: EM13181085

A small refracting spy glass telescope has an objective lens with a diameter of 2 inches. The world's largest refracting telescope at yerkes observatory has an objective lens with a diameter of 40 inches. Assuming that all light strinking the objectives passes through them how much larger is the light gathering power of yerkes the spy glass?

Reference no: EM13181085

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