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Clearnote
Q&A
Senior High
Earth Science
此題感謝
Earth Science
Senior High
about 1 yearago
蘊仔~
此題感謝
「進階 202 第五章 宇宙與天體 6. 望遠鏡所見影像的明暗程度,與光入射望遠鏡的截面積成正比。已知肉眼最暗可見 的極限星等為6等星,若肉眼瞳孔最大口徑為0.8公分,則口徑20公分的望遠鏡最 暗可見的極限星等大約為幾等? (A)2等(B)8等(C)11等(D)13等(E)16等。 。
Answers
Clearnote User
about 1 yearago
解題如下,數字自己代進去算!
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