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....
