they have the shortest wavelength, so they're very dangerous; luckily, they are blocked by Earth's atmosphere , their high frequency allows us to use them to easily see dense objects through materials, they're dangerous to us, but they're useful in sterilizing medical equipment, they're often used in heat and temperature sensing devices, they have low frequency, so they're safe to use in everyday technologies, they have have the longest wavelengths of the part of the spectrum that we can see, they are the shortest frequency of light that humans can see.

Electromagnetic Spectrum

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