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1. Lucas, Jim. "What Is Ultraviolet Light?" LiveScience.      Purch, 31 Mar. 2015. Web. 25 Apr. 2017. <http://www.livescience.com/50326-what-is-ultraviolet-light.html>.

2. "What Are the Uses of Ultraviolet Light?" Sciencing. N.p., n.d. Web. 25 Apr. 2017. <http://sciencing.com/uses-ultraviolet-light-5016552.html>.

3. NASA. NASA, n.d. Web. 25 Apr. 2017. <https://science.hq.nasa.gov/kids/imagers/ems/uv.html>.

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This is a picture of the Galaxy M81 in Ultra-Violet

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This is a picture of the Galaxy M81 in Ultra-Violet

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Technical and Practical Uses of Ultra-Violet Radiation

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Technical and Practical Uses of Ultra-Violet Radiation

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Technical-

Forensics

Practical-

Anti-Counterfeit (putting bills under blacklight)

CD/DVD players

Sun Tanning/Tanning Bed

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How is UV radiation used in certain industries?

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How is UV radiation used in certain industries?

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Ultra-Violet Radiation is used to study stars and galaxies by looking at the UV light they give off.  It can also be used to sterilize medical equipment and is used on crime scenes.

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Is Ultra-Violet radiation more harmful, helpful, or both?

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Is Ultra-Violet radiation more harmful, helpful, or both?

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UV radiation is both harmful and helpful. It can be used to prevent counterfeiting and sterilize medical equipment as well as help us further our understanding of the universe. However, it also increase skin cancer risks, causes cellular damage, and can damage your eyes because 99% of the radiation is absorbed through your eyes.

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Wavelength- 10nm to 400nm
Frequency- 8 x 10¹⁴ to
3 x 10¹⁶ Hz
Energy- 4.8065⁻¹⁹ to 1.9867⁻¹⁷ joules
Key Facts-

4 Subtypes- used when dealing with astronomical objects

Near/NUV- (300-400nm)

Middle/MUV- (200-300nm)

Far/FUV - (100-200nm)

Extreme/EUV- (10-100)

Can only travel through vacuum

Completely absorbed in atmosphere

Thermosphere is heated mainly by EUV waves from the sun

measured using rockets and satellites

3 Subtypes-

UV-A light-

(320-400nm) longest wavelength

least harmful

“black light”- used to cause objects to emit fluorescence

insects and birds and perceive visually

UV-B light-

(290-320nm)

Causes sunburns

Increases skin cancer risk and other cellular damage

About 95% is absorbed by ozone in atmosphere

UV-C light

(100-290nm)

Extremely harmful and almost completely absorbed by atmosphere

Used as disinfectant in food, air, and water to kill microorganisms by destroying their cells nucleic acids

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Where is Ultra-Violet located on the Electromagnetic Spectrum?

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Where is Ultra-Violet located on the Electromagnetic Spectrum?

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Ultra-Violet is located after visible light and right before x-rays. It is located here because of its wavelength, energy, and frequency.