What Is Ultraviolet Radiation?
Ultraviolet radiations are electromagnetic rays which are like light rays, but are not visible to the human eye. It is a part of the spectr
Tag
Fluorescence
Why Are Polar Bears White?
Why Are Polar Bears White? The bear’s color helps it to find food. Polar bears live in a part of the world that is usually covered with snow
How Does a Fluorescent Lamp Work?
How Does a Fluorescent Lamp Work? A fluorescent lamp is a long glass tube that is filled with a special kind of gas. This gas is called merc