![](https://nthumb.tpgimages.com/mid2_com_img/1339/7975/TOP10163281.jpg)
Focusing light. Light rays passing through a lens are focused inwards to a point. When light passes from one optical medium to another in which it travels at a different speed, it is bent (refracted). Lenses use this property to control light entering cameras, glasses and eyes.
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Creative#:
TOP10163281
Source:
達志影像
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RM
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須由TPG 完整授權
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