Light WavesLight Waves

ScienceScience

Quarter 1 Quarter 1

Essential QuestionsEssential Questions

How does light travel?How does light travel?

How does light react to different objects How does light react to different objects and substances?and substances?

Key VocabularyKey Vocabulary

light waveslight waves electromagnetic spectrumelectromagnetic spectrum angle of reflection angle of reflection angle of incidenceangle of incidence reflect / reflectionreflect / reflection refract / refractionrefract / refraction absorb / absorptionabsorb / absorption

Light Waves AssignmentLight Waves Assignment

You will work in a group to:You will work in a group to:

Perform experiments to demonstrate how Perform experiments to demonstrate how light waves react upon hitting different light waves react upon hitting different objects/substancesobjects/substances

Create an informational Powerpoint Create an informational Powerpoint about light waves about light waves

Movement Movement of Light Wavesof Light Waves Light travels in the form of electromagnetic Light travels in the form of electromagnetic

waveswaves Light spreads out in all directions from its sourceLight spreads out in all directions from its source Light travels in straight lines called raysLight travels in straight lines called rays Light travels at the “speed of light” Light travels at the “speed of light” 186,282 miles per second186,282 miles per second

299,792 kilometers per second299,792 kilometers per second

ReflectionReflection

Reflection Reflection happens when happens when light waves light waves bounce off a bounce off a surfacesurface

RefractionRefraction

Refraction happens Refraction happens when light changes when light changes speeds and/or is bent speeds and/or is bent (traveling from air to (traveling from air to water)water)

AbsorptionAbsorption

Absorption of light Absorption of light happens when atoms in happens when atoms in an object absorb (take in an object absorb (take in and hold) the light and hold) the light waves.waves.

For example: You are able to For example: You are able to see a red apple because all of see a red apple because all of the other light waves are the other light waves are absorbed but red is reflected absorbed but red is reflected to your eyes.to your eyes.

Experiments with LightExperiments with Light

Use the following website to conduct Use the following website to conduct experiments on reflection, refraction and experiments on reflection, refraction and absorptionabsorption

General Electric Website:General Electric Website: http://www.gelighting.com/na/home_lighting/gelhttp://www.gelighting.com/na/home_lighting/gel

a/students/science_what_is_light.htma/students/science_what_is_light.htm

Light Wave RubricLight Wave Rubric

MEME MPMP NN UU

Light Light WavesWaves

Compare Compare and give and give examplesexamples of the of the ways light ways light can be can be reflected, reflected, refracted refracted and and absorbedabsorbed

Compare Compare what what happenshappens to light to light when it is when it is reflected, reflected, refracted refracted and and absorbedabsorbed

Describe Describe that light is that light is reflected, reflected, refracted refracted and and absorbedabsorbed

Provide Provide examplesexamples of of reflection, reflection, refraction refraction and and absorption absorption of lightof light

ResourcesResources

General Electric WebsiteGeneral Electric Website

(images, experiments and content reading)(images, experiments and content reading)

SciensaurusSciensaurus