Incandescence, the glowing whiteness of a body caused by intense heat.
What is a Blowpipe?
A tube, usually bent near the end, terminated with a finely-pointed nozzle, for blowing through the flame of a lamp or gas-jet, producing thereby a small conical flame possessing intense heat. It is used in soldering silver, brass, etc. A mixture of oxygen and hydrogen when ignited constitutes the hydrogen blowpipe, invented by Dr. Hare of Philadelphia.
What is Magnesium Light?
When the metal magnesium is rolled out into a fine ribbon and heated to red heat it burns with a dazzling light.
Which is the most powerful artificial light?
The so-called Electric light. This light, whether produced by a series of galvanic cells or by dynamic power, is the most brilliant and useful.
What is a Rainbow?
The rainbow is that beautiful semi-circular band or arc of different colors in the clouds during the occurrence of rain in sunshine. When the clouds opposite the sun are very dark and rain is falling from them, the rays of the sun are divided by the raindrops as they would be by a prism. There are often two rainbows at the same time, because the primary bow is again reflected to another layer of clouds.
What is a Prism?