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Light Waves Science Quarter 1. Essential Questions How does light travel? How does light travel? How does light react to different objects and substances?

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Presentation on theme: "Light Waves Science Quarter 1. Essential Questions How does light travel? How does light travel? How does light react to different objects and substances?"— Presentation transcript:

1 Light Waves Science Quarter 1

2 Essential Questions How does light travel? How does light travel? How does light react to different objects and substances? How does light react to different objects and substances?

3 Key Vocabulary light waves light waves electromagnetic spectrum electromagnetic spectrum angle of reflection angle of reflection angle of incidence angle of incidence reflect / reflection reflect / reflection refract / refraction refract / refraction absorb / absorption absorb / absorption

4 Light Waves Assignment You will work in a group to: Perform experiments to demonstrate how light waves react upon hitting different objects/substances Perform experiments to demonstrate how light waves react upon hitting different objects/substances Create an informational Powerpoint about light waves Create an informational Powerpoint about light waves

5 Movement of Light Waves Light travels in the form of electromagnetic waves Light travels in the form of electromagnetic waves Light spreads out in all directions from its source Light spreads out in all directions from its source Light travels in straight lines called rays Light travels in straight lines called rays Light travels at the speed of light Light travels at the speed of light 186,282 miles per second 186,282 miles per second 299,792 kilometers per second

6 Reflection Reflection happens when light waves bounce off a surface Reflection happens when light waves bounce off a surface

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

8 Absorption Absorption of light happens when atoms in an object absorb (take in and hold) the light waves. Absorption 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. 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 absorption General Electric Website: http://www.gelighting.com/na/home_lighting/gel a/students/science_what_is_light.htm http://www.gelighting.com/na/home_lighting/gel a/students/science_what_is_light.htm http://www.gelighting.com/na/home_lighting/gel a/students/science_what_is_light.htm http://www.gelighting.com/na/home_lighting/gel a/students/science_what_is_light.htm

10 Light Wave Rubric MEMPNU Light Waves Compare and give examples of the ways light can be reflected, refracted and absorbed Compare what happens to light when it is reflected, refracted and absorbed Describe that light is reflected, refracted and absorbed Provide examples of reflection, refraction and absorption of light

11 Resources General Electric Website General Electric Website (images, experiments and content reading) Sciensaurus Sciensaurus


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