How big are radio waves?

Answer 1

Radio portion of the electromagnetic spectrum Radio waves are divided up into bands by frequency (and corresponding wavelength) as shown in the radio frequency spectrum table below. {| ! ! ! ! ! | < 3 Hz

> 100,000 km Extremely low frequency ELF 1 3-30 Hz

100,000 km - 10,000 km Communication with submarines Super low frequency SLF 2 30-300 Hz

10,000 km - 1000 km Communication with submarines Ultra low frequency ULF 3 300-3000 Hz

1000 km - 100 km Communication within mines Very low frequency VLF 4 3-30 kHz

100 km - 10 km Submarine communication, avalanche beacons, wireless heart rate monitors, geophysics Low frequency LF 5 30-300 kHz

10 km - 1 km Navigation, time signals, AM longwave broadcasting Medium frequency MF 6 300-3000 kHz

1 km - 100 m AM (Medium-wave) broadcasts High frequency HF 7 3-30 MHz

100 m - 10 m Shortwave broadcasts, amateur radio and over-the-horizon aviation communications Very high frequency VHF 8 30-300 MHz

10 m - 1 m FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications Ultra high frequency UHF 9 300-3000 MHz

1 m - 100 mm television broadcasts, microwave ovens, mobile phones, wireless LAN, Bluetooth, GPS and Two-Way Radios such as FRS and GMRS Radios Super high frequency SHF 10 3-30 GHz

100 mm - 10 mm microwave devices, wireless LAN, most modern Radars Extremely high frequency EHF 11 30-300 GHz

10 mm - 1 mm Radio astronomy, high-speed microwave radio relay Above 300 GHz

< 1 mm |}

Answer 2

Pretty small.

2nd Answer:

In the amateur radio bands, some of the lower frequencies have wavelengths of 160 meters. This is not even the lowest frequency that radio can be sent.

On the other hand, the higher frequencies may have wavelengths measured in centimeters. (A centimeter is about the width of a sugar cube).

3rd Answer:

The answers above are for the length of the radio waves. When a wave is transmitted, it spreads out in a sphere (like ripples when a stone is thrown into a pond). The size of this sphere has no limit (apart from the size of the universe). Imagine spheres expanding at the speed of light. If the wavelength is 160 metres, there are hundreds of spheres, spaced 160 metres apart, all expanding at the speed of light.

How big is an antenna?

It is hard to make an antenna smaller that a millimetre or bigger than a large field. The wavelength of a radio wave is typically twice the length of the antenna. This sets the lower and upper limits of easily transmitted wavelengths.

Answer 3

Just like any other type of electromagnetic radiation, that's going to depend

on its frequency.

If we say that "radio" is anything between 60 KHz and 100 GHz ... and that's

what I'm saying ... then its wavelength can be anything between 3 millimeters

and 5 kilometers. (0.12 inch to 3.1 miles)

-- The "10" marked in the middle of the AM radio dial . . . 300 meters (984 feet)

-- The "100" marked in the middle of the FM radio dial . . . 3 meters (9.8 feet)

-- The radio waves that do the cooking in your microwave oven . . . 12 centimeters (4.7 inches)

Answer 4

We generate and detect radio frequencies for purposes of communication in the range

of roughly 30 KHz to 300 GHz, corresponding to a range of wavelengths of 10,000 meters

to 1 millimeter.

Answer 5

Radio frequencies are defined as from 3 kHz to 300 GHz. The corresponding wavelengths are from 100 km down to 1 mm.

Answer 6

radio waves has the longest wavelength in electromagnetic spectrum this wavelength is ranging from 100metres-100km