Scientific Tools

Among the scientific tools that are used to gather data about the observable world and formulate conclusions about its operation, spectroscopes and spectrographs can be considered particularly vital science tools. The use that can be made of these devices embraces the analysis made of properties of light in relation to the electromagnetic spectrum. This function affords a means for the identification of specific kinds of material. Usually such scientific tools measure the intensity of light in order to produce information on it, though other variables in light quality may also furnish useful criteria for analysis, such as the polarization state of the light.

A distinguishing feature of spectroscopes among other science tools is their ability to range along a wider array of wavelengths than can usually be accomplished, including such portions of the spectrum as gamma rays, X-rays and the far infrared. A useful quality for scientific tools, this capability allows the use of spectroscopes to take place in specific sections of chemistry and widely in astronomy. The basic principles of these kinds of science tools have long been available to scientific endeavors, since the early 19th century, when spectroscopes and other scientific tools were constructed with comparatively simple materials and methods. Modern examples of the spectroscope introduce more sophisticated elements such as diffraction grates, a movable slit, and a photodetector. These science tools generally are placed under the control of a computer program.

A related subset in scientific tools are known as spectrographs. The history of these science tools began after the development and early use of spectroscopes. The invention of spectrographs was enabled by the development of photographic film, which enabled the creation of new and more sophisticated scientific tools such as the spectrograph. Technical advances in science tools have since caught up with spectrographs as well. When these scientific tools are constructed now, rather than a camera for viewing purposes they are equipped with electronic circuits built around a photomultiplier tube, which affords greater accuracy in the analysis of light properties. Another innovation in science tools has been to replace the camera with an array of photosensors, another boost to the accuracy of these system. Such developments have allowed spectrographs to be used for a greater range of subjects and with a greater degree of guaranteed accuracy. In the analysis they conduct, spectrographs assign photon numbers to delineate their findings.

The function accorded to these science tools is to separate waves incoming into the machine into frequency spectrums. This function has come into use for important technical and scientific advances of the past such as the discovery of Hubble’s law, the observation that distant galaxies are receding from the earth, and the system of star spectral classification used to order stars. One notable forthcoming instance of the use of these scientific tools is represented by the James Webb Space Telescope, which on its launch in 2012 will include among its reserves of science tools both a spectrograph and a spectroscope. Scientific professional and interested amateurs should be aware of this source of scientific insight.