CHEM 112 Lecture Notes - Lecture 12: Periodic Function, Photon

• School: Queen's University
• Department: Chemistry
• Course: CHEM 112
• Professor: Richard Oleschuk

Document Summary

Problems chapter 8: 2,4, 10, 11, 18, 19, 21 25, 29, 36, 40, 45. Microwave: molecular rotations, making the molecules rotate around. The frequency of radio waves are not greater than the frequencies of visible waves. The frequency of ultraviolet waves are greater than the frequencies of infrared waves. The frequencies of gamma waves are larger than the frequencies of x ray waves. The three dark clouds around 1990"s: the black body radiation (solid lines) doesn"t behave like classical theory predicts (dotted lines). Electron emission occurs only when frequency of the light exceeds threshold (v>vo) Number of electrons emitted depends on the intensity of the light, not the frequency. The kinetic energy (ke) of the emitted electron depends on the frequency of light. Einstein"s solution: light has particle like property the smallest unit is called the photon. Newton"s experiment showed the sunlight spectrum with a prism.