Waves transfer energy from one place to another and come in many forms that are used for different applications. Radio waves are used for wireless communication technologies like cellphones, Wi-Fi, and satellites. Microwaves are used for communication technologies and cooking food in microwave ovens. Infrared, ultraviolet, x-rays, and sound waves are all used for applications like remote controls, security cameras, medical imaging, tanning beds, and navigation. Ocean waves can also be used to generate electricity through tidal power.