are radio waves everywhere
Classification of radio waves. Radio waves are electromagnetic waves. Electromagnetic waves include waves such as X rays, ultraviolet light, visible light, infrared rays and so on, but you probably imagine radio waves to be quite different from these waves. Radio Waves are found everywhere in space. Pulsars is one source. Objects in space, such as planets and comets, giant clouds of gas and dust, and stars and galaxies, emit light at many different wavelengths. Some of the light they emit has very large wavelengths - sometimes as long as a mile!. These long waves are in the radio region of the electromagnetic spectrum. Because radio waves are larger than optical waves, radio telescopes work differently than telescopes that we use for visible > light (optical telescopes). AM Radio broadcasting is the oldest technology to feature them. Naturally, they are part of the black body radiation spectrum from just about every object in space. For objects as cold as the cosmic microwave background, and as part of the cosmic microwave background itself, radio waves are the dominant emission. Of the various kinds of electromagnetic waves, radio waves have a longer wave length than infrared rays, and are defined by the Radio Law as 'electromagnetic waves with a frequency of less than 3,000 GHz (3 THz)'. The longer microwaves, those closer to a foot in length, are the waves which heat our food in a microwave oven. Microwaves are good for transmitting information from one place to another because microwave energy can penetrate haze, light rain and snow, clouds, and smoke. Shorter microwaves are used in remote sensing. These microwaves are used for radar like the doppler radar used in weather forecasts. Microwaves, used for radar, are just a few inches long. This microwave tower can transmit information like telephone calls and computer data from one city to another. RADIO WAVES | MICROWAVES | INFRARED | VISIBLE LIGHT | ULTRAVIOLET | X-RAYS | GAMMA RAYS. Microwaves are good for transmitting information from one place to another because microwave energy can penetrate haze, light rain and snow, clouds, and smoke. Shorter microwaves are used in remote sensing. These microwaves are used for radar like the doppler radar used in weather forecasts. As the speed per second of radio waves in a vacuum is about 300,000 km (about 3×10 [m/sec]), at 433 MHz the wave length λ is. < Click to move to the calculation window >. There is a close relationship between the wave length of the radio wave and the characteristics of the antenna. In free space the propagation speed of radio waves is the same as that of light, at approximately 300,000 km, so they would arrive there in about 1.3 seconds. The speed falls slightly when passing through a conductor such as an antenna or cable. 1 The electromagnetic spectrum encompasses both natural and human-made sources of electromagnetic fields.  Frequency and wavelength characterise an electromagnetic field. In an electromagnetic wave, these two characteristics are directly related to each other: the higher the frequency the shorter the wavelength.
Yes