just for trivias(+_+)
- Betamax (colloquially termed Beta) is an obsolete home videocassette
tape recording format developed by Sony, and released on May 10, 1975.
The cassettes contained 1/2 inch (12.7 mm) wide videotape in a design
similar to the earlier, professional 3/4 inch (19.05 mm) U-matic
Like the video home recording system VHS introduced by JVC in 1976, it
had no guard band, and used azimuth recording to reduce cross-talk.
The "Betamax" name came from a double meaning: beta being the Japanese
word used to describe the way signals were recorded onto the tape, and
from the fact that when the tape ran through the transport it looked
like the Greek letter "Beta" (â). The suffix -max came from "maximum"
to suggest greatness.
- Galvanic corrosion is a process that degrades metals
electrochemically. This corrosion occurs when two dissimilar metals
are placed in contact with each other in the presence of an
electrolyte, such as salt water, forming a galvanic cell. A cell can
also be formed if the same metal is exposed to two different
concentrations of electrolyte. The resulting electrochemical potential
then develops an electric current that electrolytically dissolves the
less noble material.