What happens to the distance from the image to a convex lens (di) as the object moves closer to the lens?

Repeat steps 1 – 7, this time using the concave mirror. Be sure to angle the mirror to project the image onto the screen, as shown in figure 2. Record your calculations and measurements in data table 2.

Place a polarized film over the light source. Place another polarized film on top of the first. Slowly turn the second film while keeping the first film stationary. Notice what happens to the brightness of the light.

Analyze

1. What happens to the height of the image (hi) formed by a convex lens as the object moves closer to the lens?

2. What happens to the distance from the image to a convex lens (di) as the object moves closer to the lens?

3. How do the calculated results compare with the experimental results for the lens and mirror experiments?

4. Create a graphic organizer to show the different images created by the convex lens and concave mirror.

5. In part 3, what happened to the brightness of the light when you put the polarizing filter over the light source? What happened to the brightness as you turned the filter?

6. In part 3, describe what was happening to the light as it passed through the prism.

7. In part 3, the laser pointer used for the experiment was red. Consult an electromagnetic spectrum chart. What does the color of the laser tell you about the relative frequency of the visible light in the laser? What does the color tell you about the relative wavelength of the visible light in the laser?