What is a wavelength measured in?

Answer 1

By an equation. E=MC^2, or energy of a particle equals its mass times the speed of light squared. V=C/(lambda), or frequency equals the speed of light divided by wavelength.

The easiest way is using Planck's constant, which allows you to find frequency and then, by the equations above, wavelength, based on energy calculated by any means.

Answer 2

Wavelength is simply the length of an individual wave.

So waves are measured in metres.

Light waves in the visible spectrum are very short, wavelengths from 400nm, for violet, to 700nm for red, a nm, nanometre, is one billionth of a metre 0.000 000 001.

Waves in a microwave oven are about 0.12m.

Radio waves cover a wide range;

Longwave radio has waves between 1 and 2 kilometres (1 000 to 2 000metres).

Medium wave, used for AM stations, is around 100 metres.

VHF, very high frequency, used for FM stations around 2 metres.

Answer 3

Grammatically, The Question should probably be, " How is wavelength measured?". The answer depends on the particular waves being considered. Wavelength for any repeating wave is the distance between the wave where it starts to repeat. Typically wavelength is measured at the so called "Zero crossings" for electromagnetic (and many other types of) waves.

The techniques used to measure wavelength include radio detectors and counters, zero crossing detectors and radio receivers. If you can convert the wave to an electrical signal, you could also use an oscilloscope. A microphone connected to an oscilloscope for example can let you visually see, and therefore measure the wavelength of sound.

Wavelength proportional to the reciprocal of frequency, the so if you know the frequency (f) then the wavelength is c/f (c is the speed of light). You have to be careful with the units. For example a 600 Khz radio wave has a wavelength of approximately 500 meters (499.65). You have to use the speed of light to get the units right.

Answer 4

the top of one wave crest to the other OR the wave trough to another OR from the "middle part" to the next one after one of each crest and trough.

Answer 5

Wavelengths are measured by sound intensity meters.