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SAT, 24.06.2019 18:00
Remote sensing of the earth's surface and atmosphere may involve the use of what type of instruments?
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SAT, 29.06.2019 15:30
How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity
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