We are here with the foremost expert on light, Albert Einstein, in hopes of learning more about l light and of energy. In the previous section, we were taught that visible light is made up of seven main colours. My question is "Are there any other frequencies of light?" "Well since you asked nicely Wizard, I will answer. The answer is absolutely. We don't call the other light 'light' though. We call light's relatives electromagnetic radiation. The types of radiation or order of decreasing wavelength are: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma radiation. Each of these different types of radiation have their own properties. For example, radio waves are the waves on which we hear our music and news on the radio. These radio waves can be sent to not only places on the Earth, but also to places in space and beyond. This is how we can hear what astronauts say in space. They have a microphone that takes their voice and transmits it through radio waves to the Earth. Microwaves can be used to agitate molecules and heat the object up (used in microwave ovens). Infra-red radiation is emitted when an object gives off heat, so with infra-red goggles you can tell where there is a loss of heat. Ultraviolet radiation is very intense, and can cause damage to many things such as skin, hair and the ozone layer. We all know what x-rays do: they can pass through skin, but not dense materials like bone. Excessive amounts of x-rays can cause serious damage to your health. Finally, gamma radiation is very intense, and it can pass through almost anything. It is a very powerful and concentrated energy."  "Once again Albert, you have amazed me. Maybe you can tell me more about the relationship between light and energy." "Of course I can! But, aren't you forgetting something?" "Oh yah…." Click on the button below to continue our adventure on light and energy. In the next section we will learn some interesting facts about energy." 
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Light is a wave
like sound, but it is transverse whereas sound is longitudinal.