jälkivalaistuksen
Jälkivalaistus, also known as afterglow, is a phenomenon that occurs after the primary light source has been removed. It is commonly observed in various natural and artificial contexts. In astronomy, afterglow refers to the residual emission of light from an astronomical event, such as a supernova or gamma-ray burst, that persists long after the initial event has faded. This emission is often caused by the interaction of the event's ejecta with the surrounding interstellar medium.
In the context of photography, jälkivalaistus can refer to the lingering light that remains on the film
The scientific study of jälkivalaistus involves understanding the physical processes that cause the prolonged emission of