GaAs-based lasers are also much smaller and more powerful than normal types. Galvanizing A process for coating a protective layer of zinc to steel to prevent or inhibit corrosion. The length and extent of the protection are dependent upon the weight and thickness of the zinc coating. This gives a white matte surface that is bright and reflective. The zinc protects the steel from corrosion because zinc is a more reactive metal than the iron in the steel.
Galvanized metal is used chiefly on products such as pipe, nails, wire, container etc.
This is the largest commercial use of zinc. A form of highly energetic radiation emanating from unstable atomic nuclei and characterized by very short wavelengths about 1 angstrom . Gamma radiation is emitted slowly by decaying radioactive nuclei such as radium, and very rapidly in the fission process. Gamma radiation is highly dangerous to body tissues and may cause genetic damage or even death on prolonged exposure. Cobalt-60 has been used in industry as a source of gamma rays.