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Photonics Dictionary

actinic radiation

Actinic radiation refers to electromagnetic radiation that has enough energy to induce photochemical reactions. This type of radiation is primarily in the ultraviolet (UV) range but can also include certain wavelengths of visible and infrared light. Here are the key points:

Photochemical activity: Actinic radiation can cause chemical changes in materials exposed to it. This is because its photons have sufficient energy to break chemical bonds and initiate reactions.

Types of radiation: While UV light is the most common form of actinic radiation, visible light at the blue and violet end of the spectrum and some infrared wavelengths can also be actinic.

Applications:

Photography: Actinic radiation is used in photographic processes where it exposes film or paper coated with light-sensitive chemicals.

Medical treatments: Utilized in phototherapy for treating skin conditions and in sterilization processes.

Industrial processes: Employed in curing inks, coatings, and adhesives that harden upon exposure to UV light.

Scientific research: Used in experiments and applications where controlled photochemical reactions are needed.

Health and safety: Prolonged exposure to actinic radiation, especially UV light, can cause skin burns, eye damage, and other health issues, necessitating protective measures.

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