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the speed energy is being transferred at

measures the speed of the waves using water (practical)

radio's, TV's and laptops produce these waves

mobile phones and WIFI produce these waves

ovens and TV remote controls produce these waves

light bulbs and the colours we see produce these waves

sun beds and black lights produce these waves

can kill microbes

can see through our skin to our bones

the wave that can kill living cells and cancer cells, also known as radiotherapy