You need a microwave oven and a big bar of chocolate. For example BBC Radio 4 is on 1,500 on the old radio and 198kHz on the other, so multiply 1,500 by 198,000 Find the same radio station on both and multiplly them together. Get an old radio with the tuner marked in metres and a new one marked in Hertz. Just multiply together the wavelength and frequency of any form of electromagnetic radiation and you get the answer.įirst way. ![]() You don't need a stopwatch to measure the speed of light, Steve.
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