The World's Largest Refracting Telescope Is Operated at the Yerkes

question 141

Short Answer

The world's largest refracting telescope is operated at the Yerkes Observatory in
Wisconsin. It has an objective lens of diameter of 1.02 m. Suppose such an instrument
were mounted on a satellite at an elevation of 300 km above the ground and used to map
surface details. If the telescope is forming images with light of wavelength 550 nm, what is
the minimum separation of two objects on the ground whose separation could be clearly
resolved by this lens?

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