CHEM 1040 Lecture Notes - Lecture 15: Photon

• School: University of Guelph
• Department: Chemistry
• Course: CHEM 1040
• Professor: Richard Delaat

Document Summary

7. 2 quantum effects and photons it was believed that light consisted of a beam of particles. Diffraction is a property of waves in which the waves spread out when they encounter an obstruction or small hole about the size of the wavelength. Photoelectric effect discovered by postulating that light had both wave and particle properties. Theoretical formula was used to describe the intensity of light of various frequencies emitted by a hot solid at different temperatures. Maximum intensity from a hot solid varies in a definite way with temperature. As temperature increases more yellow and lue light become mixed with the red light giving off white light. An atom could only have certain energies of vibration, e, according to the formula. H is a constant known as 6. 63 x 10-34 j. s the number symbolized by n are the quantum numbers vibration energies of atoms are quantized where they are only limited to certain value.