The ability for animal life to produce light is called bioluminescence.
You have not given the alternatives, but this can be called reflection or scattering.
The process in which energy is given off is called an exothermic change. The energy released can be in the form of heat, light, electricity, or sound
A ray emitted from a light source is called a light ray. It represents the path that light travels in a straight line from the source in a specific direction.
The light and heat given off by the sun is called solar energy. Solar energy is produced by nuclear fusion reactions in the sun's core, which create electromagnetic radiation that reaches the Earth.
Assuming you mean the type that was invented by Thomas Edison, it is the Incandescent Bulb. Light is given off by a coiled Tungsten filament that is heated by an electric current flowing through it. The amount of light given off is rated in Lumens, but most generally the consumer relates it to "Wattage". The higher the wattage the more light given off.
The material is called a photoemissive material.
A spectrometer analyzes the light given off when an element is burned.
luminescence ?? Kind of a shot in th dark no pun intended.
expressed light. (light given off.)
The light given off by the full moon is often called moonlight. It is a soft, silvery light that illuminates the landscape at night.
The light and heat given off by the sun are actually high energy produced by nuclear fusion of hydrogen.
The bouncing of light off a surface is called reflection. When a light wave is bent it is called refraction.