AOSC 200 Lecture Notes - Lecture 4: Kelvin, Celsius, Spectrophotometry
20 Feb 2018
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Document Summary
Spectrophotometry uses photometers that can measure a light beam"s intensity as a function of its color (wavelength) known as spectrophotometers. Important features of spectrophotometers are spectral bandwidth (range of colors it can transmit through a test sample). Wave propagates at the speed of light c v = c x wavelength is the frequency of light wavelength t = c; v = 1/t = c/wavelength (frequency) Max planck suggested that the energy of light is proportional to its frequency and that light exists in discrete quanta of energy. Quantum (plural: quanta) is the minimum amount of any physical entity involved in an interaction. E = hv h stands for a fundamental constant of nature now known as planck"s constant. All objects with a temperature above absolute zero (0 k on the kelvin scale and as. Celsius [ c] = [k] - 273. 15 [k] = [ c] + 273. 15.
