The planet Neptime is 4.5 × 1012 mfromtheearth.
Chapter 19, Problem 52GP(choose chapter or problem)
Problem 52GP
The planet Neptime is 4.5 × 1012 mfromtheearth. Itsdiameter is 4.9 × 107 m. What diameter telescope objective would be necessary to just barely see Neptune as a disk rather than as a point of tight? Assume a wavelength of 550 nm.
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