W H AT A R E R A D I O WAV E S T O M ?Well Random question generator, I’ll tell you!- Radio waves are an invisible Electromagnetic radiation.- They are part of the electromagnetic spectrum (along with gamma rays, xrays, etc)- It is has one of the widest ranges in the electromagnetic spectrum.- The term “Radio” is a term describing all forms of electromagnetic radiation with a wavelength longer than a millimetre and a frequency above 300 GHz.- Radio waves with a wavelength of less than roughly 10 meters are absorbed by the atmosphere.
E L E C T RO M AG N E T I C S P E C T R U M Here on the right hand side isa diagram showing where radiofits into the ElectromagneticSpectrum. As you can see its inthe left hand section of invisiblelight and for this reason wecannot see them passing throughthe air.
O K AY, S O H O W D O P E O P L E U S E R A D I O WAV E S ? ? Radio is the most obvious of these but other than that there are plenty of otherways that we use radio waves. Wireless networks Television signals Mobile phones Radars Microwaves Sate light communication
RADIO The ‘Radio’ has two main types…- AM – (Amplitude modulated) In its simplest terms an AM receiver detects amplitude changes in the radio wavesat a particular frequency. It then amplifies changes in the signal voltage to work a loudspeaker or earphones.- FM – (Frequency modulated) is the opposite of AM sending information over a carrier wave whilst varying itsfrequency. It works by an antenna sending out radio waves to a radio.The radio then converts the signals into sound which plays outof speakers.
MICROWAVES Microwaves are an everyday appliance for humans. They use radio waves to cook items of food. The microwaves are also on the electromagnetic Spectrum andthey come next to Radio waves still within the invisible light.
WI-FIWi-Fi works similarly to radio. It works as a two ways radiocommunication. The wireless router receives radio signals anddecodes those radio signals into information. It then sends theinformation to the internet using an Ethernet cable.This gives the user the option of connecting to the internet withouthaving to connect manually with an Ethernet cable to their laptop ordesktop computer.
A CONCLUSION OF SORTS Radio waves are an important part of todays world, whether itslistening to your favourite radio station or satelights in space receivingsignals allowing a global technological community to exist. Without them we would also face many safety issues that othermodern technology has created, for example modern weaponry. From simply communicating on the telephone to using a microwave,people rely on radio waves and I truly believe that human beings wouldn’tcope without them.