CHEM 1A03 Lecture Notes - Lecture 3: Work Function, Rydberg Formula, Threshold Energy

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Emslie

Document Summary

Visible spectrum: ranges from 390nm to 760nm, roy g biv the red end has a larger wavelength and the purple has a smaller wave length. Atomic properties: atoms are mostly empty space, there is repulsion between subatomic particles of the same charge, nucleus: extremely dense centre of an atom composed of protons and neutrons. Quantum theory: quantized: to exist in discreet values (like in a packet), ex. Marbles can only exist as whole marbles meaning you can only say you have 2 or 3 marbles. Photoelectric effect: two metal plates are connected by one wire. However, the energy of an electron is not quantized. Therefore, we could use any amount of energy from photons to eject an electron from one orbital to another: photons are fired from the bottom plate to the top plate. Results of the experiment: light with a large wavelength/small frequency = 0 current.