LightChapter 13

LightChapter 13

The Visible Spectrum

Light Light

Key concepts include:Key concepts include:

Speed of light = 299, 792, 458 m/sSpeed of light = 299, 792, 458 m/s

(use: 300,000,000 m/s)(use: 300,000,000 m/s)

The visible spectrum, light waves, reflection, The visible spectrum, light waves, reflection, refraction, diffraction, opaque, transparent, refraction, diffraction, opaque, transparent, translucenttranslucent

LightLight

Explain the relationships between Explain the relationships between wavelength and the color of light. Name wavelength and the color of light. Name the colors of the visible spectrum.the colors of the visible spectrum.

ROYGBVROYGBV

VocabularyVocabulary

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

VocabularyVocabulary

Waves: a disturbance which carries energy and that travels away from the starting point.

Wavelength: the distance between one crest of a wave and the next crest

Crest: the highest point of a light wave

Trough: the lowest point of a light wave

Frequency: the number of waves (light or sound) produced in a given unit of time, such as a second

Reflection and Refraction Reflection and Refraction

Compare and contrast reflection and Compare and contrast reflection and refractionrefraction

Reflection Refraction

VocabularyVocabulary

Reflection: the bouncing of light from a Reflection: the bouncing of light from a surfacesurface

Refraction: the bending of light as it passes Refraction: the bending of light as it passes through one material to anotherthrough one material to another

Essential Knowledge, Skills, and ProcessesEssential Knowledge, Skills, and Processes

Explain the terms transparent, translucent, Explain the terms transparent, translucent, and opaque, and give an example of each.and opaque, and give an example of each.

Plastic wrap Wax paper Aluminum Foil

Transparent Translucent Opaque

VocabularyVocabulary

Transparent: materials that allow all light to Transparent: materials that allow all light to pass throughpass through

Translucent: letting light through but Translucent: letting light through but scattering itscattering it

Opaque: materials that do not let light Opaque: materials that do not let light throughthrough

Transmit: to send (as in sound or light). It Transmit: to send (as in sound or light). It also means light passing through an object.also means light passing through an object.

Questions?Questions?

Let’s Examine Let’s Examine CCOOLLOORR!!