Page "Electromagnetic radiation" Paragraph 72
from
Wikipedia
When electromagnetic radiation is incident on matter, it causes the charged particles to oscillate and gain energy.
It may also get dissipated into other microscopic motions within the matter, coming to thermal equilibrium and manifesting itself as thermal energy in the material.
With a few exceptions related to high-energy photons ( such as fluorescence, harmonic generation, photochemical reactions, the photovoltaic effect for ionizing radiations at far ultraviolet, X-ray, and gamma radiation ), absorbed electromagnetic radiation simply deposits its energy by heating the material.
In addition to infrared lasers, sufficiently intense visible and ultraviolet lasers can also easily set paper afire.
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