A Keplerian telescope has an objective lens of diameter 12 cm and focal length +90 cm, and an eyepiece of focal length +8 mm. It is used to observe Jupiter which has a true diameter of 140 000 km and a distance of 750 million km from Earth. Calculate the apparent angular diameter of Jupiter as seen through the telescope; give your answer in degrees.
A Keplerian telescope has an objective lens of diameter 12 cm and focal length +90 cm, and an eyepiece of focal length +8 mm. It is used to observe Jupiter which has a true diameter of 140 000 km and a distance of 750 million km from Earth. Calculate the apparent angular diameter of Jupiter as seen through the telescope; give your answer in degrees.
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Transcribed Image Text:A Keplerian telescope has an objective lens of diameter 12 cm and focal length +90 cm, and
an eyepiece of focal length +8 mm. It is used to observe Jupiter which has a true diameter of
140 000 km and a distance of 750 million km from Earth. Calculate the apparent angular diameter
of Jupiter as seen through the telescope; give your answer in degrees.
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