angular minute 中文意思是什麼
angular minute
解釋
角分-
A heavy - rimmed rotating wheel used to minimize variations in angular velocity and revolutions per minute, as in a machine subject to fluctuation in drive and load
飛輪一種用於減小拐彎時速度變化和每分鐘轉數的粗邊轉輪,如減小機械在運行或裝載中的變化 -
People usually think that larger telescope will magnify the object more. the magnification is the ratio of the apparent sizes of the object. for example, if the angular size of the object is one arc minute and through a telescope, its apparent size becomes 30 arc minutes, then we say the magnification is 30
很多人以為大型望遠鏡可以把天體放得更大,事實上望遠鏡要獲得很高的倍率是很容易的只要改用較短焦距的目鏡便可以了,但就算是大型望遠鏡,倍率也極少超過500倍,一般都只是使用100至200倍。
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