SME IB Physics Unit 4 Problems (id: 1299c06d5)

[单选题]
Our fingerprints are made up ofg)go 8 t.3da/gc9txj e ,5ibtlu +hc )jb gq:9hcg1 9kla series of ridges on the end of the finger. These ridges ca l9gthg,lb j5b:kq1 9u)c i+chn be 'read' by electronic devices.

The diagram below shows a certain type of fingerprint detector below, which works by scattering light when pressure is applied to a plastic screen. The ridges of the fingerprint press the plastic film against the glass when the finger is pressed to the screen.




When not in use, the plastic screen and the glass have a small air space between them. The diagram below shows the two possible paths for the light when the finger is pressed down.




Which row in the table correctly describes the properties of the fingerprint detector that cause the bright and dark patches on the image produced by the camera?

A.
B.
C.
D.


参考答案:  A


本题详细解析: 暂无