AST101H1 Lecture : The Nature of Light
12 Dec 2012
School
Department
Course
Professor
23
AST101H1 Full Course Notes
Verified Note
23 documents
Document Summary
Oct 09/12 we build up our visual world by the combination of red, green and blue white light is a mixture of other colours air molecules scatter blue light more than red light. Frequency: the number of times per second that a wave vibrates up and down. (wavespeed = wavelengthxfrequency) light is an electromagnetic wave. It is created by moving (electrons) and it causes electrons to move. Its speed is 300,000 km/s the sky is red when sunsets b. c air molecules scatter bluer light more than redder light light carries energy. B. c electrons are waves as well as particles. When the electron energy takes a good value its orbit is possible. But in between good energies is not possible higher the energy the shorter the wave length and vice versa atoms and molecules absorb energy. Temp: average kinetic energy of randomly moving atoms. Heat: thermal energy - total kinetic energy of randomly moving atoms.
