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Glossary

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A I B I C I D I E I F I G I H I I I J I K I L I M I N

O I P I Q I R I S I T I U I V I W I X I Y I Z

 

U-value

See thermal transmittance.

 

Ultraviolet radiation (UV)

Refers to invisible radiant energy with the wavelength range of 0.001 to 0.38 microns. UV can damage human skin and cause melanoma and other types of skin cancer. UV that reaches the surface of the Earth consists of two types of rays: UVA and UVB rays. UVA rays are less likely than UVB rays to cause sunburn, however UVA rays pass deeper into the skin.

 

 

 

 

 

 

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