Etymology:
The word "ultraviolet" is derived from Latin:
Meaning and Origin:
Ultraviolet radiation is a type of electromagnetic radiation that lies beyond the visible spectrum, with wavelengths shorter than violet light but longer than X-rays.
The term was first coined by Johann Wilhelm Ritter in 1801. Ritter was conducting experiments with sunlight when he discovered that a piece of paper treated with silver chloride turned black when exposed to the part of the spectrum beyond violet light. He called this radiation "chemical rays," as it had a chemical effect.
In 1878, physicist William Crookes suggested the term "ultraviolet" to describe this type of radiation. The term became widely accepted and is still used today.
Properties of Ultraviolet Radiation:
Ultraviolet radiation is divided into three main regions based on its wavelength:
UVA and UVB radiation reach the Earth's surface, while UVC radiation is absorbed by the ozone layer in the atmosphere.
UV radiation has several biological effects, including:
Etymology Infra Latin Below Red Latin Red Meaning Infrared radiation refe
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