Radiation is simply light, and as light it
carries energy, and as energy it can carry heat.
You get hit with a powerful laser as in a sci-
fi, and this is how it would kill you, by
cooking you. However, solar radiation can
include high frequency light, like ultraviolet,
which is energetic enough to ionize atoms, which
causes additional kinds of damage.
Ionizing radiation can do two things: first, it
can simply kill cells, and it can cause
mutations. Some mutations in body cells are bad,
because they can break the controls that prevent
cells from dividing, which results in them
becoming cancerous. Sunburn is what you
experience from dead cells that have been killed
by ionizing radiation.
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