Unit 3 Visible Light

Part 1 What do you know? BRAINSTORM Let’s take a closer look at rainbows. BRAINSTORM 1. How are rainbows made? 4. What is visible light made of? 3. What do you think the electromagnetic spectrum is?

EXPLOREATION TIME Stuff: Flashlight, Prism, Used CDs, and Diffraction Gradient Slides 1. Explore the materials and observe how the different items interact with light form your flashlight. 2. Use the sunlight too if it is available.

Ask yourselves: 1. What have we tried so far? 2. What do we think is happening? 3. Why did we set up the materials this way? 4. Can we think of another way we might get similar results? 5. What have we observed outside the classroom that is simmilar? 6. What questions have we generated based on our observations?

Share Your Findings Record Our Ideas Below How did the white light change into colors? Record Our Ideas Below

Isaac Newton’s Investigation Part 2 Isaac Newton Isaac Newton’s Investigation

Questions Why did Newton use a second prism? Why do you think that? Does anyone have a different way to explain the same thing?

Refraction Demonstration 1. What happened to the light when it traveled from the air to through the glass prism? 2. What happen to the light when it traveled through water? 3. Observe the path of light through air and water. 4. Map the light path as it travels through air, then water, then back through air. Read the book Principles of Light

Video Observing Refraction of Light Why did the straw appear bent? What was the difference between shining the light from air to solid and air to liquid?

Complete you journal entry on page 13. Part 3 Wrap Up Question: How are Rainbows Made? Light travels in ___________ _________. White light is _______________________. Light ________ when traveling from one medium to another. Different wavelengths ______ in different amounts separating light into different ____________ of the _______________. Complete you journal entry on page 13.