Satellite

If we want to send data from one surface of the earth to another, we often use satellitesSatellites are often used if we want to send information from one surface of the earth to another. The information is sent to the satellite from the earth with the antenna facing towards the space Is sent. The satellite receives the signal and sends it back to the other side. Numerous channels on television are thus distributed all over the world.On 12 May 2018, Bangladesh's first Satellite-1 was launched into space.Bangladesh is the 57th country in the world to have its own satellite.Optical Fiber: Once upon a time, all the information of the world was sent inside the cable as electrical signal or wireless wireless signal. Now a whole new technology has been developed to send information and data all over the world That is optical fiber technology.Optical fiber is actually a very transparent fiber of glass, it starts like a hair and through it information and data can be sent as a signal of light. Laser light is used for light signal. You will be surprised to hear this light but it cannot be seen with the naked eye. An optical fiber can send the equivalent of one million telephone lines, so it has become a medium of communication all over the world.