[img]http://upload.wikimedia.org/wikipedia/commons/a/a0/Military_laser_experiment.jpg[/img]
A camera captured this picture during an experiment testing the coherence of the laser source. But I have a question, how can the camera capture this picture?
I mean, when the laser travels in air, we can't actually see the rays. Why the image can be captured by a camera then?
Laser experiment
2007-01-02 4:14 am
回答 (1)
2007-01-02 9:46 am
✔ 最佳答案
人眼只能看到可見光，如果laser之光頻超出可見光，人眼便不能看到有關光線。同理，菲林之可見光是比人眼強，所以看到有關影像亦不足為奇。
收錄日期: 2021-04-12 22:28:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070101000051KK04623