angular size造句
例句与造句
- As a natural limit for angular resolution, one may take the angular size of the central diffraction disk .
我们可以取中心衍射环的角直径作为角分辨率的一种自然极限。 - The combination of very large radio flux and exceedingly small angular size means that the sources have a fantastic surface brightness .
极大的射电流量同极小的角经集于一身，意味着这些发射源有难以置信的高表面亮度。 - The intervening matter between the source and the observer gravitationally deflects and focuses the light bundle, increasing the apparent angular size of the source .
光源与观测者之间的物质对光束产生引力偏折和聚焦作用，使光源的视角径加大。 - The angular size of the moon viewed from the earth is about 0 . 5
从地球看来，月球的视直径即月面最远两点的角距约为0 . 5度。 - Thus , we can use our hands to measure roughly the angular sizes of various objects
换句话说，我们可以用自己的手作量角器，量度天体的大小或距离。 - It's difficult to find angular size in a sentence. 用angular size造句挺难的
- Since the distance between the moon and the earth is not constant , the angular size of the moon can have a small variation
由于地球和月球的距离并不固定，所以在地球看来，月球的角大小亦会出现变化。 - The angular size , measured in degrees or arc seconds , which is very important in astronomy , is not commonly used in everyday life
我们亦会介绍一个天文学上非常重要，但日常生活很少接触到的概念角距和角大小。 - It could happen that the moon is at the right position , but its angular size is too small to cover the whole sun . hence , there will be an
有时，月球虽然处于能造成日食的位置，但由于月球的角大小不足以掩盖整个太阳，便会出现 - During solar eclipse , if the angular size of the moon is larger than that of the sun , the sun will be totally covered , resulted in total solar eclipse
日食solar eclipse时太阳被月球所侵蚀与及月食lunar eclipse时月球被地影所蚕食的意思亦显而易见。 - At arm s length , the angular size of our fists is about 10 , fingers is about 1 and the tip of the thumb to the tip of the little finger of an extended hand is about 20
将手伸直后，拳头的角大小约为10度，手指约为1度，若把手掌张开，由拇指尖至小指尖的角距则约为20度。 - Due to the tidal friction , the moon is receding from us . tens of thousand of years later , the angular size of the moon will be so small that there will be no total solar eclipse anymore
由于潮汐摩擦作用，月球正逐渐远离地球，数万年后，月球的视直径会变得很小，届时地球上便再不能看到日全食了。 - The distance measurement in astronomy is very basic , but also very difficult . for example , it is very easy to measure the angular size of a galaxy . but in order to find out its actual size , we have to know the distance between the galaxy and us
距离的量度是天文学上最基本但亦极困难的工作，例如在宇宙深处的一个星系，我们要量度它的角大小非常容易，但要知道这星系的真正大小，就要同时知道它和我们的距离。 - 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
很多人以为大型望远镜可以把天体放得更大，事实上望远镜要获得很高的倍率是很容易的只要改用较短焦距的目镜便可以了，但就算是大型望远镜，倍率也极少超过500倍，一般都只是使用100至200倍。