Monday, 2/23: Ray Diagrams Practice

Concept-Development 30-2 is due today. Please finish this and turn it in first.

Today you will be creating your own ray diagrams to scale. The "to scale" part is very important and is the topic of today's bellwork. Please see me if you need help creating a scale and/or using a scale.

The assignment:

Using scale ray diagrams, find di (the distance to the image) for each of the following:

1. Convex lens, f=2 km and do (distance to the object)=4 km
2. Convex lens, f=10 cm and do=40 cm
3. Convex lens, f=100 cm and do=50 cm
4. Concave lens, f= -5 ft and do=7 ft

Note that #4 has a negative focal length. Don't worry about this; it is simply a sign convention that we have not learned. In your ray diagram, you will treat f= -5 ft just like you would treat f= +5ft.

This is due the next time I see you (Tuesday for per. 1, 3, 5 and Wednesday for per. 4 and 6).