A diverging lens(发散透镜) deviates(使偏移) parallel light outward as though it originated at a single virtual focal point(虚焦点).
发散透镜把平行光向外偏移了,好像这光是从一个虚焦点发出来似的。
举一反三
- ______透镜对光有发散作用，所以又叫发散透镜．
- 与英文“lens”"“focus”“focallength”“opticalcenter”意思相对应的是（） A: 透镜，焦点，焦距，光心 B: 焦距，焦点，光心，透镜 C: 光心，焦距，焦点，透镜 D: 透镜，焦距，焦点，光心
- 下列哪些Light可以产生投影？（） A: Spot B: Point C: Parallel D: Ambient
- 208.下列哪些Light可以产生投影?() A: Spot B: Point C: Parallel D: Ambient
- _____ is the focal point in an opera house?
内容
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That is a ______ point in his argument. A: focal B: vocal C: ocal
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声透镜 acoustical lens
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isthe exiting track that continues straight. A: diverging track B: point blade C: straight track
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The depth of field depends on ______. A: aperture B: the distance between camera and subject C: the size of the subject D: the focal length of the lens
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一个会举薄透镜和一个发散薄透镜互相接触而成一复合光具组, 当物距为一 [tex=21.214x1.286]ZhiPrkNZPijvhr0koYvdbKkcjWZsURGHCe40i3tfQdG4xrLXakOyaVzhX7NT72ZJ+/J5dkqn0xwVYJuVCnNS8WJpcfBDs+P7580j65Kii4k=[/tex], 问发散透镜的焦距是多少?