The process of producing light as a result of high temperature is called _______________.
2.
A _______is a light producing electronic device that allows an electric current to flow in only one direction.
Now used in Christmas lights illuminated signs, and traffic lights.
3.
A _____________ light tube is filled with very low-pressure mercury vapour. The inner surface of the tube is also coated with a fluorescent material.
4.
Light from an electric discharge, such as lightning is produced by an electric current passing through a _______.
5.
Fluorescence occurs when an object absorbs _______________ light and immediately releases the energy as visible light.
6.
______________________ is the production of light as a direct by-product of a chemical reaction.
Light sticks operate by causing two chemicals to mix.
7.
When chemiluminescence occurs in living organisms, scientists call it ____________________.
8.
Any object, as it gets hotter and hotter, will eventually produce __________ of varying colors.