fotoluminiscencji

Fotoluminiscencja, also known as photoluminescence, is a process in which a substance absorbs photons (light) and then re-emits them at a different wavelength. This phenomenon is widely used in various fields, including biology, chemistry, and materials science. The process can be divided into two main types: fluorescence and phosphorescence.

Fluorescence occurs when a substance absorbs light and re-emits it almost immediately, typically within nanoseconds. The emitted light has a longer wavelength than the absorbed light, resulting in a lower energy emission. This type of luminescence is commonly used in biological imaging and in the development of fluorescent dyes.

Phosphorescence, on the other hand, involves a longer delay between absorption and emission, often lasting milliseconds to minutes. The emitted light is also of longer wavelength than the absorbed light. Phosphorescence is used in applications such as glow-in-the-dark materials and certain types of lighting.

Fotoluminiscencja is influenced by several factors, including the chemical structure of the substance, the wavelength of the absorbed light, and the environment in which the substance is found. The study of photoluminescence provides valuable insights into the properties of materials and can be used to develop new technologies and applications.