Introduction and types of spectrum

Spectra pattern polychromatic light after dispersion system (such as a prism, a grating) spectrophotometry, was spread by the monochromatic color wavelength (or frequency) and size in order of priority, called the spectrum. The largest part of the spectrum is a part of the visible spectrum of the electromagnetic spectrum visible to the human eye, in the wavelength range of visible light is referred to as electromagnetic radiation. Spectrum does not contain all the colors of the human brain visual that can be different, such as brown and pink.

Light is made up of atoms within the movement of electrons generated. The movement of atoms of various substances different internal electronics, they are also different light emission. Case studies of different luminescent material that absorbs light and has important theoretical and practical significance, has become a specialized discipline spectroscopy. The following outlines some of the knowledge spectrum.

Spectroscope spectroscopic observation of spectrum use, here we speak about construction principles spectroscope. Spectroscope constructed by the collimator, consisting of prism and telescope tube.



Spectral Type:
Spectrum emission spectrum emitting objects directly called emission spectrum. Emission spectra of two types: continuous spectrum and bright line spectrum;
Continuous distribution contains various colored light from red to violet spectrum, called a continuous spectrum. Hot solid, liquid and high-pressure gas emission spectrum is a continuous spectrum. Such as light, the light emitted by hot molten steel lamp filaments are emitted a continuous spectrum.

Only contains some discontinuous bright line spectrum is called bright line spectrum. Bright line spectrum of the bright line is called the line, each corresponding to a different spectral line wavelength light. Emission spectrum rarefied gas or metal vapor is bright line spectrum. It is a bright line spectrum of atomic emission free state, also called atomic spectroscopy.

Observation of a solid or liquid substance atomic spectrum, you can put them into the gas lamp flame or arc to burn, so that they gasification light, you can see them in the bright line spectrum from a spectroscope.

Experiments show that, atoms of different, bright line emission spectra are different, atoms of each element has a certain bright line spectrum. Each atom can only emit certain wavelengths of light has its own characteristics, so the bright line spectrum, called spectral lines characteristic lines atoms. By atomic characteristic lines can identify the structure of matter and the study of atoms.

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