Sentences with phrase «ultraviolet light»

"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.
Under a microscope illuminated with ultraviolet light, the layers come into focus.
They also were marked with a unique design that could only be viewed under ultraviolet light.
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.
This condition is produced by the strong ultraviolet light emitted from the very luminous, hot stars embedded in the gas.
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.
I also see ultraviolet light, which is good to detect because it damages 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.
Some of those detect colors people can't even see, such as ultraviolet light.
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.
They might be able to transform harmful ultraviolet light into more comfortable visible light.
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).
Their giant, 30,000 - lens eyes can detect ultraviolet light.
Other potential environmental triggers include ultraviolet light, certain drugs, infections, exhaustion, and mental or physical stress or trauma.
It protects against ultraviolet light, injury and dehydration.
If the psoriasis is extensive, ultraviolet light treatment is one of the safest options.
However, ultraviolet light does not penetrate below the stratosphere.
When ultraviolet light hits these zinc groups, they absorb energy and convert it into heat.
Life as we know it probably couldn't exist in the daylight, if all of the sun's ultraviolet light reached us.
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.
Try this simple exploration to explore ultraviolet light with your child.
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.
But a couple of days under weak ultraviolet light before you pick it can make the lettuce more palatable.
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.
Only the human offspring that could handle ultraviolet light perhaps or could handle bitter cold.
The product should now be stored out of direct ultraviolet light and heat.
It also differs according to clean - ability, ultraviolet light deterioration, noise absorption, fire resistance, and life span.
Individual beads are simply removed, added to water and illuminated with ultraviolet light.
He used compounds that change under ultraviolet light, such as the light from the sun.
In this case, the energy was supplied by ultraviolet light, which triggered the reaction.
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.
But so far, cigarette smoking, ultraviolet light exposure, and asbestos are among the few factors that are beyond debate.
Typically our titanium dioxide applications use ultraviolet light to activate the catalyst.
So we're shining ultraviolet light on molecules that are on surfaces, which makes electrons come out.
The compound also increases the potency of vitamins C and E, both nutrients that protect the eye's lens from harmful ultraviolet light.
Its nucleus is predicted to emit and absorb ultraviolet light.
I would love to learn how oxygen prevents oxygen from combining when lightning and ultraviolet light do it every day.
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