What are 3 facts about Ultraviolet?

About Ultraviolet (UV) Radiation and Sun Exposure
  • The atmosphere does little to shield these rays—most UVA radiation reaches Earth’s surface.
  • UVA rays cause skin aging and eye damage, and can lower your body’s ability to fight off illness. UVA rays also contribute to the risk of skin cancer.

What are 4 facts about ultraviolet radiation?

UVA rays are associated with deep damage to skin, causing wrinkles, premature aging and potential skin cancers. UVB rays burn your skin up and hurt your eyes. UV rays can be helpful for certain processes, so long as they are not applied to our skin. Some fruit juices can be pasteurized by running UV rays over them.

What are the 5 uses of ultraviolet?

5 Uses for UV Disinfection
  • Air Disinfection. Any facility that needs to disinfect air spaces can use a UV light to do so, to some extent. …
  • Water Disinfection & Wastewater Treatment. …
  • Surface Disinfection. …
  • Equipment Disinfection. …
  • Food & Beverage Disinfection.

What is the description of ultraviolet rays?

Invisible rays that are part of the energy that comes from the sun. Ultraviolet radiation that reaches the Earth’s surface is made up of two types of rays, called UVA and UVB. Ultraviolet radiation also comes from sun lamps and tanning beds.

What is the characteristic of ultraviolet ray that makes it harmful?

Unlike X-rays, ultraviolet radiation has a low power of penetration; hence, its direct effects on the human body are limited to the surface skin. The direct effects include reddening of the skin (sunburn), pigmentation development (suntan), aging, and carcinogenic changes.

Does ultraviolet light have a color?

UV light has a shorter wavelength than visible light. Purple and violet light have shorter wavelengths than other colors of light, and ultraviolet has even shorter waves than violet does; so ultraviolet is sort of “purpler-than-purple” light or “beyond violet” light.

What are some examples of ultraviolet light?

Q: What effect does UV radiation have on my body?
  • Tanning booths.
  • Mercury vapor lighting (often found in stadiums and school gyms)
  • Some halogen, fluorescent, and incandescent lights.
  • Some types of lasers.

What are examples of ultraviolet waves?

What are examples of ultraviolet waves? Ultraviolet waves have wavelengths between 10 and 400 nanometers. These waves are emitted by the Sun and other celestial bodies. However, on Earth they are found to be emitted by black lights, welding flashes, UV tanning beds, and other technologies.

What is ultraviolet radiation for kids?

Ultraviolet rays are short light waves produced by the sun, and there are three types of ultraviolet rays. Most people are exposed to UV-A rays, and the Earth’s atmosphere absorbs most harmful UV-B and UV-C rays. The concept of ultraviolet light was discovered by Johann Ritter in the early 1800s.

What are examples of ultraviolet waves?

What are examples of ultraviolet waves? Ultraviolet waves have wavelengths between 10 and 400 nanometers. These waves are emitted by the Sun and other celestial bodies. However, on Earth they are found to be emitted by black lights, welding flashes, UV tanning beds, and other technologies.

How do you explain UV to a child?

Does ultraviolet light have a color?

UV light has a shorter wavelength than visible light. Purple and violet light have shorter wavelengths than other colors of light, and ultraviolet has even shorter waves than violet does; so ultraviolet is sort of “purpler-than-purple” light or “beyond violet” light.

What is the wavelength of ultraviolet?

100-400 nm
The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).

Can humans see ultraviolet?

According to almost any source about the light spectrum, visible light, the portion of the electromagnetic spectrum that is visible to the human eye, is the range of wavelengths between 400 to 700 nanometers. Ultraviolet light (UV), which ranges from 10 to 400 nanometers, is not detectable to the human eye.

Is ultraviolet light high or low energy?

There are many types of radiation, ranging from very high-energy (high-frequency) radiation – like x-rays and gamma rays – to very low-energy (low-frequency) radiation – like radio waves. UV rays are in the middle of this spectrum. They have more energy than visible light, but not as much as x-rays.

Does ultraviolet light have high energy?

Ultraviolet radiation (UV) is a type of radiant energy, much like the light we see, but with a smaller wavelength and higher energy. It is defined as the light in the spectrum of wavelengths between 40-400 nanometers.

Is ultraviolet harmful?

Risks. Sunburn is a sign of short-term overexposure, while premature aging and skin cancer are side effects of prolonged UV exposure. UV exposure increases the risk of potentially blinding eye diseases, if eye protection is not used. Overexposure to UV radiation can lead to serious health issues, including cancer.

How is ultraviolet light produced?

UV radiation is produced either by heating a body to an incandescent temperature, as is the case with solar UV, or by passing an electric current through a gas, usually vaporized mercury. The latter process is the mechanism whereby UV radiation is produced artificially.

Does UV light produce heat?

Ultraviolet (UV) radiation is responsible for more than 95% of all skin cancers. The sun emits UV radiation but it isn’t connected to sunshine or heat like many think.