CHEM 167 Lecture Notes - Lecture 6: Noble Gas, Pauli Exclusion Principle, Electric Current
14 Oct 2016
School
Department
Course
Professor
Document Summary
The detection of chemicals present at low or extremely low levels. Non destructive testing: does not require that samples be decomposed. Amount of light absorbed related to quantity of element. Visible light - smallest portion of the electromagnetic spectrum. Light radiation - wave traveling through space. Two components to electromagnetic radiation consisting of oscillating electric and magnetic fields. Wavelength, - the distance between two coresponding points on a wave. Amplitured, size or height of a wave. Frequency, v, is the number of cycles of the wave passing a given point per second (hertz, hz) Velocity: all light has the same speed in vacuum. C = 2. 998 x 10 8 m/s. Refraction - bending of a wave, when it passes from one medium to another of different density. Speed of light changes in passing from air to glass. Light bends at an angle depending on wavelength. Light separates into its component colors in order of wavelength.
