Light Waves

* If items 7-10 do not load, go to tools -> internet options -> advanced -> Scroll all the way down, and put check marks by all of the SSL and TLS options. Then click Apply and OK and the sites should work when you refresh them.

* If the animations in item 10 do not play, update Java (https://www.java.com/en/download/help/java_update.xml).

Part 4: Light Blox

Watch the Light Blox movie.

Shadows (write answers in your journal)

1. Turn on ONE Light Blox. Shine the Light Blox at the pencil and observe the shadow. How can you make a shadow shine to your left?

2. How can you make the shadow bigger? How do you make the shadow smaller?

3. How can you make the shadow disappear while still shining the light on the pencil?

4. Turn on two Light Blox. Experiment with shadows made from two light sources coming from different directions. What do you notice?

Light and Color (write answers in your journal)

1. Hold the diffraction grating up to your eye and look through it towards the lights in the room (DO NOT LOOK AT THE SUN). Look to the edge of the slide - what do you see?

2. Remove the line caps from all three light blox; turn them on and set them on a piece of plain white paper so that you can see the colors.

3. Move the light blox so that two colors over lap to make a new color. What colors did you use to make a new color? What new color did you make.

4. How many new colors can you make? List the colors you used and the new color for each combination. EXAMPLE: RED + GREEN = YELLOW

5. What happens when you combine all three colors? Can you make “white” light?

Refraction (write answers in your journal or use the provided template page)

PUT THE LINE CAP ON the front of the Light Blox

1. Turn on ALL THREE Light Blox. Using the template page, set up three Light Blox and the CONCAVE lens as directed. On the template page, draw the beams that pass through the lens. Describe what happens to the light beams as they pass through the CONCAVE Lens.

2. Now use the template page to set up three Light Blox and the CONVEX lens as directed. On the template page, draw the beams that pass through the lens. Describe what happens to the light beams as they pass through the CONVEX lens.

Exploration

Use the light blocks to demonstrate the following three things. In your journal, draw a diagram of each and write a sentence describing how the set up shows each thing.

Reflect
Absorb
Transmit

Complete the Sound Waves assignment sheet.

Optional Extension:

Waves on a String Simulation

Run the Waves on a String simulation:

https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html

Work through the instructions and answer the questions on your Waves on a String assignment sheet.