The planet neptune is 417times1012 from the earth its
The planet Neptune is 4.17×1012 from the Earth. Its diameter is 5.02×107 m. What diameter telescope objective would be necessary to just barely see Neptune as a disk rather than as a point of light? Assume a wavelength of 620 nm.
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the planet neptune is 417times1012 from the earth its diameter is 502times107 m what diameter telescope objective would
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