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4,0000000
it costs £5 to make one and it produces no energy
500w
how much energy the wave is transporting
20
1000.000
about $100?
i think 120
£4 million
I'm not exactly sure but it is not very much. It also depends on how strong the wave is.
A wavelength doesn't have energy. The wave does. The details depend on the type of wave. Assuming an electromagnetic wave, you have to multiply the frequency by Plank's constant. To find the frequency, divide the speed of the wave by the wavelength.
They cost about 14.99-17.99 at CVS