Microwaves have wavelengths that can be measured in centimeters.The longer microwaves, those closer to a foot in length, are the waves which heat our food in a microwave oven.Microwaves are good for transmitting information from one place to another Continue reading


   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