Question

What happens when light falling on a material (usually a metal) causes photoelectric emission?

Options

• The material produces electromagnetic waves by a spark discharge.

• The detector loop emits ultraviolet light.

• The material emits positive ions into the surrounding space.

• The material emits electrons.

Answer 1

Photoelectric emission occurs when light falling on a material, usually a metal, causes it to emit electrons. The emitted electrons escape from the metal surface into the surrounding space.