|
|
发表于 2017-1-9 20:12
来自手机
|显示全部楼层
此文章由 huashi911du 原创或转贴，不代表本站立场和观点，版权归 oursteps.com.au 和作者 huashi911du 所有！转贴必须注明作者、出处和本声明，并保持内容完整
gracegenie 发表于 2017-1-9 16:31
桉树为啥能影响信号？
Alan Young, Research Leader with CSIRO Telecommunications and Industrial Physics. "Trees of any sort have been known to block radio signals - they both absorb the signal and scatter it in many directions."
Dr Young's team have conducted measurements in rural areas and have recorded lower signals when they passed trees. "I don't think it's peculiar to gum trees; there is no evidence that gum trees are worse than introduced trees," he said.
It does appear, however, that moisture is the culprit. A dead tree absorbs fewer signals than a live tree without leaves, which absorbs less than a tree with leaves. Live trees with leaves that have rain on them absorb the most signals.
http://www.abc.net.au/science/articles/2002/06/12/578753.htm |
评分
-
查看全部评分
|
Ayers Rock HTC手机拍摄 (2012-4-29) leohuali 
楼主:哇哇哇
