Truthburgler⭐⭐⭐
RobbleX2
The frequency is the number of waves that pass a point in space during any time interval, usually one second. We measure it in units of cycles (waves) per second, or hertz.https://science.howstuffworks.com/light4.htm 
Read more
Give Me Liberty Or Give Me Death Patrick Henry, March 23, 1775.No man thinks more highly than I do of the patriotism, as well as abilities, of the very worthy gentlemen
Read more