1. Light Chapter 13 The Visible Spectrum

2. Light ä Key concepts include: ä Speed of light = 299, 792, 458 m/s (use: 300,000,000 m/s) (use: 300,000,000 m/s) ä The visible spectrum, light waves, reflection, refraction, diffraction, opaque, transparent, translucent

3. Light ä Explain the relationships between wavelength and the color of light. Name the colors of the visible spectrum. ä ROYGBV

4. Vocabulary ä Visible spectrum (visible light): a combination of several different wavelengths of light traveling together. It is part of the Electromagnetic Spectrum.

5. Vocabulary ä ä Waves: a disturbance which carries energy and that travels away from the starting point. ä ä Wavelength: the distance between one crest of a wave and the next crest ä ä Crest: the highest point of a light wave ä ä Trough: the lowest point of a light wave ä ä Frequency: the number of waves (light or sound) produced in a given unit of time, such as a second

6. Reflection and Refraction ä Compare and contrast reflection and refraction Reflection Refraction

7. Vocabulary ä Reflection: the bouncing of light from a surface ä Refraction: the bending of light as it passes through one material to another

8. Essential Knowledge, Skills, and Processes ä Explain the terms transparent, translucent, and opaque, and give an example of each. Plastic wrap Wax paper Aluminum Foil Transparent Translucent Opaque

9. Vocabulary ä Transparent: materials that allow all light to pass through ä Translucent: letting light through but scattering it ä Opaque: materials that do not let light through ä Transmit: to send (as in sound or light). It also means light passing through an object.

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