screen of TV
回答 (1)
2007-06-14 5:11 am
✔ 最佳答案
the screen of TV is opaque. It is actually full of tiny spots filled with fluorcent material. When the electron beam from behind hits the spot, it glows. So you can see the pictures on the tv svreen.
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https://hk.answers.yahoo.com/question/index?qid=20070613000051KK04284