Day 61: Lens Lab Begins!

Monday, 11 November 2013

It’s finally time to pull out the optics benches! A few of my classes got started on a (thin) lens lab and everyone worked on their classwork. The objective of the lab is to identify the focal length of a mystery lens chosen by the lab group. Students will turn around with that focal length to predict the location of an image based on an object I choose.

The classwork set focused on a few key ideas — solving the lens equation for any of the variables, ray tracing to locate images, and image characteristics based on object placement relative to a lens. Before the classwork, I defined convex lensconverging lensconcave lens, and diverging lens. The kids also had a chance to play with a set of concave and convex desktop lenses from Arbor Scientific (side note: yowzers! I had no idea these things were that expensive).

2013-11-12 10.13.28

The desktop lenses I used to illustrate how converging and diverging lenses got their names.

My classes have hit their stride — kids have learned that every topic comes with some notes, a classwork problem set on paper, a homework problem set on Moodle, and most include a lab. We often work the assignments in that order, too.

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One thought on “Day 61: Lens Lab Begins!

  1. Pingback: Day 62: Lens Lab | Physics180

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