2 Essential Questions How does light travel? How does light react to different objects and substances?
3 Key Vocabulary light waves electromagnetic spectrum angle of reflectionangle of incidencereflect / reflectionrefract / refractionabsorb / absorption
4 Light Waves Assignment You will work in a group to:Perform experiments to demonstrate how light waves react upon hitting different objects/substancesCreate an informational Powerpoint about light waves
5 Movement of Light Waves Light travels in the form of electromagnetic wavesLight spreads out in all directions from its sourceLight travels in straight lines called raysLight travels at the “speed of light”186,282 miles per second299,792 kilometers per second
6 ReflectionReflection happens when light waves bounce off a surface
7 RefractionRefraction happens when light changes speeds and/or is bent (traveling from air to water)
8 AbsorptionAbsorption of light happens when atoms in an object absorb (take in and hold) the light waves.For example: You are able to see a red apple because all of the other light waves are absorbed but red is reflected to your eyes.
9 Experiments with Light Use the following website to conduct experiments on reflection, refraction and absorptionGeneral Electric Website:
10 Light Wave Rubric ME MP N U Light Waves Compare and give examples of the ways light can be reflected, refracted and absorbedCompare what happens to light when it is reflected, refracted and absorbedDescribe that light is reflected, refracted and absorbedProvide examples of reflection, refraction and absorption of light
11 Resources General Electric Website (images, experiments and content reading)Sciensaurus