_ELECTROMAGNETIC WAVES_

Electromagnetic waves are waves that can propagate even though there is no medium. Propagate in a wave of electromagnetic energy with a few characters that can be measured, namely: wavelength / wavelength, frequency, amplitude / amplitude, velocity. Amplitude is the height of the wave, while the wavelength is the distance between two peaks. Frequency is the number of waves passing through a node in one time unit. Frequency depends on the speed of the wave merambatnya. Since the speed of electromagnetic energy is constant (speed of light), wavelength and frequency is inversely proportional. The longer a wave, the lower the frequency, and the shorter the higher the frequency of a wave.

Electromagnetic energy emitted, or released, by all the time in the universe on a level that berbedabeda. The higher level of energy in an energy source, the lower the wavelength of the energy produced, and the higher frequency.
Differences in the characteristics of the wave energy is used to classify electromagnetic energy.
Which includes an electromagnetic waveWave wavelength λmm-wave radio 1 10 000 kmInfrared 0.001 to 1 mm400-720 nm visible light10 UV-400nmX-rays from 0.01 to 10 nmgamma rays 0.0001 to 0.1 nm
Cosmic rays do not include electromagnetic waves, the wavelength is smaller than 0.0001 nm.
Rays with large wavelength, ie radio waves and infrared, has a frequency and lower energy levels. Rays with a wavelength of small, ultra violet, x rays or roentgen rays, and gamma rays, has a frequency and a higher energy level.