Teacher :Copper wire can transmit voice holding better quality rather than opitical fiber...!

It's not suitable theme for holiday-studay of schoolchild!.

Teacher :Mr.KIMURA, I guess you copied and pasted this contents from some adult book...!

KIMURA :I've done this experiment really!.

KIMURA : I've made Copper wires and optical fibers into these thread telephons.!

Using the thread telephons we compared the quality of voice in experiment!

Teacher : What am I to do now? I can't understand both the theory of optical

communications and KIMURA's thinking....

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No.427 10/09/01 夏休みの自由研究は・・・