Weegy: B. Light shining on a metal can emit electrons.
Source: The photoelectric effect is the name given to the observation that when light is shone onto a piece of metal, a small current flows through the metal. [ The light is giving its energy to electrons in the atoms of the metal and allowing them to move around, producing the current. However, not all colours of light affect metals in this way. No matter how bright a red light you have, ... (More)