fotosensitatiivisen

Fotosensitatiivinen is a Finnish term that translates to "photosensitive" in English. It describes a substance or organism that exhibits a reaction when exposed to light. This reaction can vary widely depending on the specific entity involved.

In the context of chemistry and materials science, a photosensitive substance will undergo a chemical change upon light exposure. This is the principle behind many photographic processes, where light activates a chemical on film or paper, creating an image. Examples include silver halides, which darken when exposed to light, and photoresists used in semiconductor manufacturing.

For living organisms, photosensitivity can refer to several phenomena. Some plants are photosensitive, meaning their growth, flowering, or other biological processes are influenced by the duration and intensity of light. In humans and animals, photosensitivity often relates to the skin. Certain medical conditions or medications can make the skin abnormally sensitive to sunlight, leading to exaggerated sunburns, rashes, or other adverse reactions. This is sometimes referred to as photosensitivity or photodermatitis. Certain eye conditions can also cause increased sensitivity to light.

The term fotosensitatiivinen broadly encompasses any response triggered by light energy, whether it's a chemical transformation, a biological process, or a physiological reaction.