The visible spectrum and the absorption spectrum.
Emission Spectrum Absorption Spectrum 1) The emission spectrum is obtained due to emission of radiation from the substances. The absorption spectrum is obtained when the substance absorbs the radiation. 2) White lines are formed on the black background. Black lines are formed on the white background. A star is a hot dense ball of gas so we should expect it have a continuous spectrum. But stars also have thin, transparent outer layers that light has to pass through. These layers produce absorption lines. Thus the light from the sun and stars are examples of absorption spectra. The stars' spectra differ from each other depending on temperature and composition. When astronomers first observed these differences in the 19 th century they devised a classification system that assigned letters to various spectral types. The lines occur where atoms of the gas have absorbed specific wavelengths of light. Hence we call this type of spectrum an absorption spectrum. If we view this transparent gas against a black background we would see that it also emits light (if it has an enough energy), giving an emiss The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The electromagnetic spectrum of an object has a different meaning, and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. A discussion of the regions (or bands or types) of the electromagnetic spectrum is given below. Note that there are no precisely defined boundaries between the bands of the electromagnetic spectrum; rather they fade into each other like the bands in a rainbow (which is the sub-spectrum of visible light). An emission spectrum looks like the opposite of an absorption spectrum, with emission lines at specific wavelengths. In fact, the wavelengths of the emission lines are the same as the absorption lines (for the same type of gas). These discrete lines are due to the quantum nature of the atom. Florescent lights, neon signs, and many streetlights are examples of emission spectrum sources. The lines occur where atoms of the gas have absorbed specific wavelengths of light. Hence we call this type of spectrum an absorption spectrum. If we view this transparent gas against a black background we would see that it also emits light (if it has an enough energy), giving an emiss A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum. The word was first used scientifically within the field of optics to describe the rainbow of colors in visible light when separated using a prism. Electromagnetic spectrum refers to the full range of all frequencies of electromagnetic radiation and also to the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. Devices used to measure an electromagnetic spectrum are called spectrograph or spectrometer. The electromagnetic spectrum. All the different kinds of electromagnetic radiation are essentially the same stuff as light: they're forms of energy that travel in straight lines, at the speed of light (300,000 km or 186,000 miles per second), when electrical and magnetic vibrations wiggle from side to side. Absorption Spectrum. 1) The emission spectrum is obtained due to emission of radiation from the substances. The absorption spectrum is obtained when the substance absorbs the radiation. 2) White lines are formed on the black background. Black lines are formed on the white background The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes  the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each traveling in a wave-like pattern at the speed of light. The visible spectrum is the part of the electromagnetic spectrum that can be seen by the human eye. The wavelength of visible light ranges from 390 to 700 nm. The absorption spectrum of a chemical element or chemical compound is the spectrum of frequencies or wavelengths of incident radiation. The emission spectrum refers to the spectrum of radiation emitted due to an atom or molecule making a transition from a higher to a lower energy state. Electromagnetic spectrum refers to the full range of all frequencies of electromagnetic radiation and also to the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. Devices used to measure an electromagnetic spectrum are called spectrograph or spectrometer.
http://www.adichemistry.com/general/atomicstructure/spectra/atomic-spectra.html http://astro.unl.edu/naap/ebs/spectraltype.html https://en.wikipedia.org/wiki/Electromagnetic_spectrum http://astro.unl.edu/naap/ebs/spectraltype.html https://en.wikipedia.org/wiki/Spectrum http://www.explainthatstuff.com/electromagnetic-spectrum.html http://www.adichemistry.com/general/atomicstructure/spectra/atomic-spectra.html http://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html https://en.wikipedia.org/wiki/Spectrum
what kind of spectrums are there