Uses for UV light include getting a sun
tan, detecting forged
bank notes in shops, and hardening some types of
see UV lamps in clubs, where they make your clothes glow.
This happens because substances in washing powder "fluoresce"
when UV light strikes them - they absorb the UV and then re-radiate
the energy at a longer wavelength. The lamps are sometimes
called "blacklights" because we can't see the UV
coming from them.
you mark your posessions with a security marker pen, the ink
is invisible unless you shine a UV lamp at it.
rays can be used to kill microbes.
Hospitals use UV lamps to sterilise surgical equipment and
the air in operating theatres. Food and drug companies also
use UV lamps to sterilise
doses of Ultraviolet rays cause
the body to produce vitamin D, and this is
used by doctors to treat vitamin D deficiency and some skin