Uses of EM Waves 4
| First | First | Last | Quiz Score Total | Question 4 | Rapid pulses of light can be sent down ............ fibres. | These are very thin strands of ............ . | Visible light has a short ............ so it can carry a lot of information eg telephone or cable TV signals. | Quiz Percentage Grade |
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| First | First | Last | Quiz Score Total | Question 4 | Rapid pulses of light can be sent down ............ fibres. | These are very thin strands of ............ . | Visible light has a short ............ so it can carry a lot of information eg telephone or cable TV signals. | Quiz Percentage Grade |