The categories of the electromagnetic (EM) spectrum, in the ascending order of their frequencies are:
Hence, Radio waves have the lowest frequency and the longest wavelengths while Gamma rays have the highest frequency and the shortest wavelengths.
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all of the em spectrum is measured i waves
there is no need of medium to travel
The EM spectrum, is based upon the emission of photons at different wavelengths. Visible light is a small part of this spectrum. As all of the spectrum travels at the speed of light - C. The frequencies for different wavelenghts of photons will be different. The creation of these different parts of the spectrum are from different oscillations (http://en.wikipedia.org/wiki/Electromagnetic_spectrum#Rationale) For instance radio waves come from the oscillation of electrons in an antenna. Limitations on these oscillations cause the limitation in the spectrum, at one end there is radiowaves, limited by electron oscillation and the at the other side is gamma from the creation of particle antiparticle pairs.
The seven parts of the EM spectrum are radio waves, micro waves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays. But there is one section that is not included in the spectrum. witch is cosmic rays. They do no exist on planet earth. If they did, we would all die.
just beyond violet in the visible light section of the em spectrum
No. In fact, when people try to carve up the EM spectrum into categories and typesand classifications and then name each part, they usually wind up giving the name"radio waves" to the part with the longestwavelengths.
all of the em spectrum is measured i waves
Most of the EM spectrum is visible light.
All electromagnetic (EM) waves are in the EM spectrum. This is from "ELF" (3-30hz) through visible light (300Thz+), out past gamma rays. Any wave above DC that broadcasts into space is part of the EM spectrum.
Visible light is a very small part of the EM spectrum and it is intellectual laziness to refer to all EM radiation as light.
The electromagnetic (EM) spectrum is a name for different types of radiation. Most radiation comes from the sun. Want more info?
See:What_is_a_visible_spectrum
there is no need of medium to travel
The EM spectrum, is based upon the emission of photons at different wavelengths. Visible light is a small part of this spectrum. As all of the spectrum travels at the speed of light - C. The frequencies for different wavelenghts of photons will be different. The creation of these different parts of the spectrum are from different oscillations (http://en.wikipedia.org/wiki/Electromagnetic_spectrum#Rationale) For instance radio waves come from the oscillation of electrons in an antenna. Limitations on these oscillations cause the limitation in the spectrum, at one end there is radiowaves, limited by electron oscillation and the at the other side is gamma from the creation of particle antiparticle pairs.
EM spectrum involves all radiations of different wavelengths. This has been very useful in studying various things in the field of science. Certain range of wavelengths are also very important in critical analytical techniques.
Wavelength and frequency :)
-- The lowest frequencies that we have a name for are what we call "radio" waves. -- The highest frequencies that we have a name for are what we call "gamma" rays. Although there is not upper or lower limit in the electromagnetic spectrum.