LIGHT

   It’s a kind of energy called “electromagnetic (EM) radiation”. There are other kinds of EM radiation too (radio waves, microwaves, x-rays, etc.).Light travells very fast and straight about 186,000 miles per second [300,000 kilometers per second], so light from Continue reading

ALTERNATING CURRENT

                  AC is short for alternating current. This means that the direction of current flowing in a circuit is constantly being reversed back and forth. This is done with any type of AC current/voltage source.The electrical current in your Continue reading