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electromagnetic waves they are basically used by all types only some have different names and are a type of it Like wireless is : Hertzian waves (electromagnetic waves) well the elctormagnetic waves can smd!
Ionosphere
They're found everywhere. When you consider that radio waves are sent out by every radio or TV station, every police or fire walkie-talkie, taxicab dispatcher, Bluetooth device, cordless telephone, garage door opener, cellphone, and smartphone in the world, you start to realize that no matter where you are, the room you're sitting in right now is bathed in the radio waves from a million sources or more.
Ionosphere
phonograph records and the radio
Satellites are used to relay radio waves to the other side of the world because radio waves cannot travel directly through the Earth.
The radio waves from a lightning stroke travel at the speed of light, you can hear them as clicks on a long-wave radio, and they travel round the world in 1/7th of a second.
Some tsunami waves have travelled most of the way around the world, and have destroyed coastline thousands of kilometres from their origin.
Radio waves travel at the speed of light, approximately 186,000 miles per second. The Earth is approximately 25,000 miles in circumference. A radio wave traveling at the speed of light would take about 0.134 seconds to go around the world. In fractional terms, a touch over one eighth of a second.
electromagnetic waves they are basically used by all types only some have different names and are a type of it Like wireless is : Hertzian waves (electromagnetic waves) well the elctormagnetic waves can smd!
They have a great website. Please check it out. SETI stands for the Search for Extraterrestrial Intelligence. It is a project which started in 1959 to search for radio signals from intelligent life in space. The SETI project uses radio telescopes from around the world to scan the sky and look for special patterns in radio waves which could have been sent by another civilization in space. Radio telescopes are used because radio waves can travel very far in space without being absorbed by the thick clouds of gas and dust which lie in many regions of space. Also, radio telescopes can be used both day and night. We have been sending out our own radio waves into space for over sixty years. All of our radio and televison signals travel into space at the speed of light and may one day be detected by another civilization in space.
Is it allowed to travel around the world with the world passport?
Ionosphere
Yes, many carpenters travel around the world.
Yes they do. They communicate with a ground station by way of radio transmissions. That way, their position can be tracked at all times.
An airplane can travel around the world. Its' flight would be said to be transglobal.
It wouldn't because waves go toward Mexico not away from Mexico. Ha ha ha.