Modern Meaning in The Physical Sciences
In the 17th century the word spectrum was introduced into optics, referring to the range of colors observed when white light was dispersed through a prism. Soon the term referred to a plot of light intensity or power as a function of frequency or wavelength, also known as a spectral density.
The term spectrum was expanded to apply to other waves, such as sound waves that could also be measured as a function of frequency. The term now applies to any signal that can be measured or decomposed along a continuous variable such as energy in electron spectroscopy or mass to charge ratio in mass spectrometry. Spectrum is also used to refer to a graphical representation of the as a function of the dependent variable.
Read more about this topic: Spectrum
Famous quotes containing the words modern, meaning, physical and/or sciences:
“It is obvious that all sense has gone out of modern marriage: which is, however, no objection to marriage but to modernity.”
—Friedrich Nietzsche (1844–1900)
“Skill sheets, workbooks, basal reader, flash cards are not enough. To convey meaning you need someone sharing the meaning and flavor of real stories with the student.”
—Jim Trelease (20th century)
“The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking, and its right to exist is coextensive with its power of resisting extinction by its rivals.”
—Thomas Henry Huxley (1825–95)
“Normally, the sciences distance themselves from life and the return to it via a detour.”
—Johann Wolfgang Von Goethe (1749–1832)