"Ultraviolet light" refers to a type of light that we cannot see with our eyes. It is a form of electromagnetic radiation that comes from the sun and has a shorter wavelength than visible light. It can have both positive and negative effects on things like our skin and eyes, and is commonly used in things like disinfection and scientific research.
Full definition
This response is activated through the response
of ultraviolet light on the retina, at the back of the eye.
Since the ozone layer absorbs
ultraviolet light from the sun, ozone layer depletion can lead to increased rates skin cancer, eye damage and other adverse consequences.
When skin cells are damaged
by ultraviolet light they produce more pigment, which makes skin appear darker.
This glue can be cured
using ultraviolet light in five seconds flat — very handy if you're operating on a living heart in flowing blood.
Each image shows a different wavelength of
extreme ultraviolet light that highlights a different temperature of material on the sun.
Vitamin D3 is the natural - occurring form of vitamin D produced from the reaction of
ultraviolet light on the skin.
Upon
ultraviolet light exposure, a chemical reaction occurs such that the interaction between the reinforcing agents and the polymer increases, thus making the material stiffer and stronger.
To «print» on it, they exposed the material to
ultraviolet light for 30 seconds or more, and it changed from white to a deep blue.
Then he set up a plasma lamp to fire beams of
ultraviolet light at the chamber, much like the radiation present in planet - and star - forming regions of dust clouds.
But if it has a self - cleaning coating you can make those organic molecules react away just by
shining ultraviolet light on the surface.
In this upper atmosphere, ozone is made
when ultraviolet light from the sun splits an oxygen molecule (O2), forming two single oxygen atoms.
Its importance is that ozone acts as a filter for certain wavelengths of
ultraviolet light which can be harmful for life on earth.
But this study demonstrated that both molecular oxygen and ozone can be made without life when
ultraviolet light breaks apart carbon dioxide (a carbon atom bound to two oxygen atoms).
Other potential environmental triggers
include ultraviolet light, certain drugs, infections, exhaustion, and mental or physical stress or trauma.
But the baby is born with a liver full of vitamin D, and outside exposure allows the baby to get the vitamin D from
ultraviolet light even in winter.
There is strong evidence that some bacteria can survive
strong ultraviolet light from the sun and other space radiation.
Never place them immediately in full sun after they've grown in the low light of a fluorescent fixture or they will
get ultraviolet light damage and burn up.
Although ultraviolet light from stars would break apart water molecules, after hundreds of millions of years an equilibrium could be reached between water formation and destruction.
However, since birds differ strongly in how well they
see ultraviolet light, the markings should only be visible to those bird species that have the right type of colour vision.
The compound also increases the potency of vitamins C and E, both nutrients that protect the eye's lens from
harmful ultraviolet light.
I would love to learn how oxygen prevents oxygen from combining when lightning and
ultraviolet light do it every day.
Phrases with «ultraviolet light»