The cat sensor does the work for you and keeps your cat safe. 1  With the Litter-Robot, maintenance is easy and infrequent. We recommend emptying the waste drawer once every 7-10 days for a single cat household, and more often if you have multiple cats.
It's simple. Radio waves travel unbelievably fastâat the speed of light (300,000 km or 186,000 miles per second). Analog radio. Ocean waves carry energy by making the water move up and down. In much the same way, radio waves carry energy as an invisible, up-and-down movement of electricity and magnetism.
Radio waves travel at the speed of light, 186,000 miles per second. How long would it take for a radio message to travel from Earth to the moo... Radio waves, visible light, infrared, ultraviolet, X-rays, and gamma rays are all the same thing - photons. They just carry different energy per photon, and therefore oscillate at different frequencies. The higher the energy, the higher the frequency.