LASER Light is helpful..

@tinsky (163)
October 9, 2009 9:55am CST
Laser light is a new alternative to killing a virus, which is less damaging to human tissue than other methods. this is good news right?
1 person likes this
1 response
• China
10 Oct 09
yup,it is very useful in our life,for example,it can be used for cutting metal,measuring distance,curing some disease,etc!