That depends on the wavelength of the electromagnetic radiation.
-- If the waves are long, then we use them for radio, TV, and cellphones.
-- If the waves are shorter than that, then we use them for GPS in the car.
-- If the waves are shorter than that, then we use them to heat meatloaf in the microwave oven.
-- If the waves are shorter than that, then they warm us and they make our plants grow ... like the ones we eat.
-- If the waves are shorter than that, then our eyes use them to see with.
-- If the waves are shorter than that, then they tan our skin.
-- If the waves are shorter than that, then they can cause cancer on our skin.
-- If the waves are shorter than that, then they can cause cancer and other diseases in places inside our body.
Electromagnetism significantly affects people through communication technologies, medical applications, everyday appliances, solar energy utilization, and health considerations. Its applications range from radio waves used for conversations to X-rays in medicine and visible light aiding in photosynthesis for plants. Understanding electromagnetism's dual role as both beneficial and potentially harmful is essential for modern living.
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