PhysicsChapter 11: Electromagnetic Waves
Ultraviolet
Introduction
Ultraviolet (UV) radiation lies beyond violet light at higher frequency and shorter wavelength. UV photons are more energetic than visible-light photons.
Definition
Sources
Important sources include: the Sun; specialised UV lamps.
Useful Applications
UV can be used in: security marking; fluorescence; some sterilisation processes; forensic detection; * curing certain materials.
Biological Effects
Excessive UV exposure can damage cells and DNA. It can contribute to: sunburn; skin damage; increased risk of skin cancer; eye damage.
Protection
Protection includes: suitable clothing; shade; UV-protective eyewear; sunscreen as appropriate.
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UV
- Beyond violet