Write an activity with shows that light travels in a straight line
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Take a candle. Burn it and take apiece pf pipe. Now see the candel with straight pipe. You will see the candel. next time use the turned pipe in which the candel will not be visible. Hence the light travels in a straight line.
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when we see in an straight pipe we can see easily but when we bent this pipe we cannot see anything that means light travels in a straight path
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