本题目来源于试卷: Optical Instruments，类别为 IB物理学
[问答题]
In attempting to discenxi iv4 -q /c,:.yiuwnrn distant de1hvrjr 8/ trdr34kj8 ytails, people will sometimes squint. Why does thisr 4y8 /rhk13jr8dr jvt help?
参考答案:
To see far objects clearly, you want your eye muscles relaxed, which makes your lens relatively flat (large focal length). When you f-stop your eye down by closing your eyelids partially (squinting), you are only using the middle of your lens, where it is the most flat. This creates a smaller circle of confusion for the lens, which helps you see distant objects more clearly.
本题详细解析:
暂无
| 
