https://questions.collegedunia.com/exams/questions/consider-a-refracting-telescope-whose-objective-ha-67a095461ae1c8937915ab84
Consider a refracting telescope whose objective has a focal length of 1m and the eyepiece a focal...
Consider a refracting telescope whose objective has a focal length of 1m and the eyepiece a focal length of 1cm, then the magnifying power of this telescope...
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https://impacts.ucar.edu/en/publications/2017-upgrade-and-performance-of-bicep3-a-95ghz-refracting-telesco/
2017 upgrade and performance of BICEP3: A 95GHz refracting telescope for degree-scale CMB...
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Buy 15X-150X 70mm Large Aperture Astronomic Refracting Monocular Telescope with Tripod Eyepiece...
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