No. Optical storage uses lasers to "see" the media (e.g. CD, DVD, HD-DVD and BluRay)
are gems used as rubies called lasers
Yes, rubies are used in some LASERs. These LASERs are (not surprisingly) called ruby LASERs.
The TopCon lasers are used in the construction industry These lasers are used as positioning equipment and are used by surveyors, civil engineers, construction contractors and equipment operators.
Diamonds are commonly used when creating lasers.
I suppose that scandium was used up today in garnet lasers.
Green lasers are used for lights of a particular place. Green lasers can also be used for airplanes and others. It also can make people to see.
Lasers are used in medicine, for eye treatment and also for hair removal.
the plural of laser is lasers. for example I have many lasers. you don't say I have many laser.
Cold lasers are safer and deal less pain than hot lasers. Cold lasers are usually used for repairing skin damage and treating pain and inflammation. Hot lasers are simply used for burning things.
DVD players cannot play Bluray discs. The lasers and the data storage are different so no data can be read from a Bluray disc in a DVD drive. That is the case whether or not there is any up-scaling available in the player. Bluray players on the other hand are quite happy to play DVDs as well as Bluray discs.
DPSS (Diode-Pumped Solid-State) lasers are more efficient that normal lasers. They are primarily used in laser pointers, with the green laser being the stongest and yellow the weakest.