Which is true of infrared waves? 1. They have shorter wavelengths than X-rays.
2. They give off more energy than gamma rays.
3. They have longer wavelengths than ultraviolet waves.
4. They have higher frequencies than visible light waves.

it is stable as it is in group 0 which have full outer shells of electrons

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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