CHEM 130 Chapter Notes - Chapter 2.1-2.6: Niels Bohr, Diffraction, Emission Spectrum

• School: U of M
• Department: Chemistry
• Course: CHEM 130
• Professor: Jadwiga Sipowska

Document Summary

Electromagnetic radiation is one way energy travels through space. Wavelength is the distance between 2 consecutive points on a wave ( ) Frequency is the number of waves that pass a given point per second (v) Speed: all electromagnetic waves travel at the speed of light (c) Ince all (cid:449)a(cid:448)es t(cid:396)a(cid:448)el at (cid:862)c(cid:863) ((cid:1006). 9979 x (cid:1005)(cid:1004)8 m/s) F(cid:396)e(cid:395)ue(cid:374)cy is (cid:373)easu(cid:396)ed i(cid:374) (cid:862)cycles pe(cid:396) seco(cid:374)d(cid:863) o(cid:396) hertz (hz), units are 1/s. Photoelectric effect refers to the phenomenon in which electrons are emitted from the surface of a metal when light strikes it. Minimum energy required to remove an electron eo= h vo. Light has both wavelike and particulate matter properties. Diffraction results when light is scattered from a regular array of points or lines. Constructive: peaks and troughs of beam are in phase bright area. Destructive: peaks and troughs of beam are out of phase dark spots.