Your body uses chemical energy to get your strength, and both you and your teacher are correct. Chemical energy in plants and other food is potential energy. Your body actually doesn't shut down totally when you sleep of course, because the your digestive system is always working, breaking down the food into chemical and heat energy fueling your lungs, brain, heart, etc. Good luck and thanks for asking. My name is Tiffany.
Light is made up of waves called electromagnetic waves, but they are all invisible to our eyes.
Together they form the electromagnetic spectrum. These electromagnetic waves have different wavelengths and frequencies. The distance between one wave peak and the next one is called the wavelength. The number of these peaks that pass by you each second is called the frequency. Each of these colors has its own wavelength and frequency.