CHM 2041 Lecture Notes - Lecture 7: Emission Spectrum, Louis De Broglie, Magnetic Quantum Number
Document Summary
Light emitted from atoms gives us clues about how electrons are arranged in atoms. Transverse wave: perpendicular oscillating electric and magnetic fields. Wavelength (l): distance traveled by a wave in 1 complete oscillation; distance from the top (crest) of one wave to the top of the next wave; successive troughs/nodes. Wavelength is measures in m, cm, nm, . 1 = 1 x 10-10 m = 1 x 10-8 cm frequency, v (nu), measured in s 1 (hertz) (hz): number of complete oscillations or cycles passing a point per unit time (s) Speed of propagation: distance traveled by ray per unit time in vacuum, all electromagnetic radiation travels at same rate. C= 2. 998 x 108 m/s (speed of light) C= d/t, t= d/e = 10x10^3 m/3. 00x10^8 m/s = 3. 3x10^-5 s = 33 microseconds. Planck studied blackbody radiation, such as that of a heated object, and realized that to explain the energy spectrum he had to assume:
