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Light

Light. Light Energy. http :// studyjams.scholastic.com/studyjams/jams/science/energy-light-sound/light-absorb-reflect-refract.htm video on reflection/refraction Light travels in a straight line from its source. As it travels it interacts with matter.

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Light

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  1. Light

  2. Light Energy • http://studyjams.scholastic.com/studyjams/jams/science/energy-light-sound/light-absorb-reflect-refract.htmvideo on reflection/refraction • Light travels in a straight line from its source. • As it travels it interacts with matter. • There are four ways light interacts with matter.

  3. Four ways light interacts with matter • Dropbox file • Sci 5Unit 04 Lesson 02 Light Energy Interactions with Matter (1) • Glue this page in your journal on page L15

  4. New Vocabulary • Medium:a substance through which something is carried or transmitted. • Examples: • Glass • Air • Water • Lens Write this definition & examples in your journal on page R 15.

  5. Is the pencil bent or not? Draw this in your journal on page R 15. Describe how the pencil looks in the two substances.

  6. Nature of Light • http://app.discoveryeducation.com/player/view/assetGuid/C86B50C0-9B52-4105-9290-D7970E0D780C • http://app.discoveryeducation.com/player/view/assetGuid/C86B50C0-9B52-4105-9290-D7970E0D780C • http://app.discoveryeducation.com/player/view/assetGuid/B648336B-86F5-4766-BFBE-74B5C50784D4 • http://app.discoveryeducation.com/player/view/assetGuid/77B39343-56D7-4D9F-AB02-4C5AB47CB419

  7. Lenses Observe how light travels through the different lenses. Draw this in your journal on page R 15 Concave Lens Convex lens

  8. Lab activities • Take laminated card and put a drop of water on the back. • Observe how the light is interacting with the drop of water. • Draw a picture in your journal. • Clean up the water and turn your card over. • Put a drop of water over the word written on the card. • Make observations and draw a picture. • What type of lens did the water droplet represent? Convex or Concave?

  9. Refraction Lab • Safety procedures while using laser lights. • Refraction:The bending of light waves when they pass from one kind of matter to another.

  10. Review • Did you prove that light travels in a straight line? • What properties of an object cause refraction? • What is refraction? • What can light travel through?

  11. Convex lens • Curved out at the middle • Causes light to bend or refract • Images appear larger • Examples of convex lenses: • Camera, microscope, projector, hand lens, eye

  12. Reflection Lab • Reflection:The return of light as it bounces off something. • Follow procedure on Reflection Lab page. • What path does light travel? • What properties cause reflection? • What mediums reflect light?

  13. Convex & Concave • Which object from the Reflections Lab was a convex surface? • Which object was a concave surface?

  14. Reflection Examples

  15. Reflection

  16. Questions • What properties of water cause reflection? • Did anyone notice this with the water magnifier as well?

  17. Using two mirrors How many stars do you see at each position? What happened as you made the angle smaller? What caused that to happen? Explain based on what you know about light.

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