Ultraviolet Waves By Lilli Schussler and Emily Madrigal

Wavelength and Frequency -Violet is the color that has the highest visible frequency. -Electromagnetic waves of frequencies higher then violet are ultraviolet. -Violet is the color that has the highest visible frequency. -Electromagnetic waves of frequencies higher then violet are ultraviolet.

The Energy Of UV Waves UV Waves have a frequency that is HIGH Thus electrons are vibrating rapidly -This takes a lot of energy! - Considered high in energy. UV Waves have a frequency that is HIGH Thus electrons are vibrating rapidly -This takes a lot of energy! - Considered high in energy.

Effects on Humans Positive Effects -Vitamin D -Psoriasis therapy Negative Effects -Erythema (sunburn) - Photoaging -Skin Cancers: melanoma, basal cell carcinoma, and squamous cell carcinoma. - Photokeratitis (blindness) Positive Effects -Vitamin D -Psoriasis therapy Negative Effects -Erythema (sunburn) - Photoaging -Skin Cancers: melanoma, basal cell carcinoma, and squamous cell carcinoma. - Photokeratitis (blindness)

Uses -Ultraviolet waves are effective in killing bacteria and viruses. -Medicine -Industry -Science -Ultraviolet waves are effective in killing bacteria and viruses. -Medicine -Industry -Science

 Three different galaxies taken in visible light (bottom three images). Ultraviolet light (top row)  The difference in how the galaxies appear is due to which type of stars shine brightest in the optical and ultraviolet wavelengths. By comparing these types of data, astronomers can learn about the structure and evolution of galaxies.

Fun Facts! -The ozone layer blocks some UV light, which is useful for human health, but which distorts our image of the universe -New snow can reflect up to 80% of ultraviolet rays, while normal ground surfaces and bodies of water tend to reflect less than 10% -Many fruits, flowers and seeds stand out more strongly from the background in ultraviolet wavelengths as compared to human color vision. -Many birds have patterns in their plumage that are invisible at usual wavelengths but observable in ultraviolet -The Sun emits ultraviolet radiation in the UVA, UVB, and UVC bands, but because of absorption in the atmosphere's ozone layer, 99% of the ultraviolet radiation that reaches the Earth's surface is UVA. -The ozone layer blocks some UV light, which is useful for human health, but which distorts our image of the universe -New snow can reflect up to 80% of ultraviolet rays, while normal ground surfaces and bodies of water tend to reflect less than 10% -Many fruits, flowers and seeds stand out more strongly from the background in ultraviolet wavelengths as compared to human color vision. -Many birds have patterns in their plumage that are invisible at usual wavelengths but observable in ultraviolet -The Sun emits ultraviolet radiation in the UVA, UVB, and UVC bands, but because of absorption in the atmosphere's ozone layer, 99% of the ultraviolet radiation that reaches the Earth's surface is UVA.