AST101H1 Chapter Notes - Chapter 5: Diffraction Grating, Cmyk Color Model, Cyan

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Bryan Gaensler

Document Summary

The energy that light carries is radiative energy. The rate of energy flow is called power, which we measure in watts. You can produce a spectrum with either a prism or a diffraction grating. Materials that transmit light are said to be transparent, and materials that absorb light are called opaque. When you walk into a room and turn on the light switch. The light bulb begins to emit white light, which is a mix of all the colours in the spectrum. Some of the light exits the room and is transmitted through the window. The rest of the light strikes the surfaces of objects inside the room, and the material properties of each object determine the colors it absorbs or reflects. The light coming from each object carries information about the object"s location, shape, structure and composition. Your brain interprets the messages that light carries, recognizing materials and objects in the process we call vision.