Actinity

Under actinism (also Aktinismus ; of ancient Greek ἀκτίς , genitive ἀκτῖνος , ἡ, beam ') is the photochemical efficacy of electromagnetic radiation of different wavelengths.

The term is used, for example, to assess the physiological effects of laser light of different colors or the spectral sensitivity of photographic films and photographic papers . In photochemistry , actinic chemicals are those that are sensitive to light or radiation.

Actinic inspection of masks in the production of computer chips refers to testing at the same wavelength of light that is used for production.

In medicine, actinic means “caused by radiation or light” (e.g. actinic dermatitis ).