Problem Set 1

20.309 Spring Semester 2008 Problem Set 1 Due Thursday, February 12, 2009

Question 1

For this question, you will need to go by the lab and make a few measurements of lenses. The whole thing should take about twenty minutes.

1. Measure the focal lengths of the lenses marked A, B, and C
2. Turn on the halogen lamp.
3. Move the screen to produce a focused image.
4. Measure the distance d₁ from the imaging target to the 75mm lens, the distance d₂ from the lens to the screen, and the height H of a feature on the image.
5. Repeat this measurement for several values of d₁

A

What is your estimate of the focal lengths of lenses A, B, and C?

B

What is the relationship between d₁, d₁, and H? Make a plot of your measurements that shows this relationship.