AST201H1 Chapter : AST— Jan 19 Lecture + Chapter Notes

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Michael Reid

Document Summary

How do we experience light? y light carries radiative energy that it can exchange with matter. Power is the rate of energy transfer, measure in watts: 1 watt = 1 joule/s. The colors of light contain a great deal of information about the matter which it has interacted y light is a form of energy: carries radiative energy y energy and power, units- joules, power the rate of energy flow. measured in unites called watts: 1 watt = 1 joule/s y light and color. Interested in measuring the rate at which light carries energy toward or away from us: spectrum red, orange, yellow, green, blue, and violet. white when the basic colors are mixed in roughly equal proportions. black is when there s no color: can make a spectrum using a prism or a diffraction grating (a piece of plastic with many closely spaced lines)