UV Meaning: Definition and Examples
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UV
[juː viː ]
Definition
science technology
UV stands for ultraviolet, which refers to a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. It is commonly associated with its effects on skin and its use in sterilization processes. UV radiation is emitted by the sun and is used in various applications such as disinfection, fluorescence, and in some types of photography.
Synonyms
Examples of usage
- Sunscreen can protect your skin from harmful UV rays.
- UV sterilization is effective in killing bacteria.
- The UV light emitted by the lamp is strong enough to cause damage.
- Animals like bees can see UV patterns on flowers that humans cannot.
- Many tanning beds emit UV radiation.
Interesting Facts
Science
- Ultraviolet light is divided into three types: UVA, UVB, and UVC, each with different effects on living organisms.
- UVA rays are the longest and can penetrate deep into the skin, contributing to aging and skin cancer risk.
Health
- Excessive exposure to UV rays can lead to skin damage, eye problems, and a weakened immune system.
- Sunscreens often protect against UVB rays, which are primarily responsible for sunburn.
Pop Culture
- In movies and comics, UV lights are often portrayed as weapons against vampires and other supernatural beings.
- UV graffiti is a popular art form that only becomes visible under special black lights, adding intrigue to street art.
Environment
- The ozone layer protects Earth by filtering out most harmful UV radiation from the sun.
- Climate change is causing thinning of the ozone layer, leading to increased UV exposure on the Earth's surface.
Origin of 'UV'
Main points about word origin
- The term 'ultraviolet' comes from Latin, meaning 'beyond violet', indicating that it has a shorter wavelength than visible violet light.
- Ultraviolet light was discovered in the early 19th century when scientists started experimenting with prisms and sunlight.
The term 'ultraviolet' originates from the Latin word 'ultra', meaning 'beyond', combined with the word 'violet', which is the color of the shortest visible wavelength of light. The concept of ultraviolet light was first described in the 1800s when scientists discovered that sunlight could produce effects beyond the violet end of the spectrum. This discovery was significant in the fields of physics and chemistry, particularly in understanding the behavior of light and its interactions with matter. Over time, the term 'UV' has become widely used in various scientific disciplines, including biology, medicine, and environmental science, particularly in discussions around sun exposure and its health implications.