First, a little video... http://www.youtube.com/watch?v=D2FX9rviEhw.

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Presentation transcript:

First, a little video... http://www.youtube.com/watch?v=D2FX9rviEhw

Light and Optics SNC2P Physics

What is light? Light is energy and travels as a wave

Properties of a Wave

Using the picture or your textbook, define these terms: Wavelength: Crest: Trough: Amplitude:

How is light produced? Incandescence: Light is produced by a HOT object. Example: Fire or light bulb in a lamp Not very efficient because heat is produced!! Luminescence: Light is produced without much heat. Example: Glow stick (chemical reaction) or neon lights (fluorescence) ??What tricks can we use to remember what these terms mean??

Examples of Incandescent Light

Examples of Luminescence

Homework Page 279 #2, 4