If you sit under a leafy tree on a sunny day, you may notice spots of sunlight on the ground from light passing through spaces between the leaves. Try putting a piece of cardboard on the ground and examining the spots of light on the...

Try changing the aperture in the pinhole camera simulation below and taking an image. After experimenting with it for a while, answer the questions below.

In this activity, students construct their own pinhole camera to observe the behavior of light.

Pinhole cameras are not a thing of the past. Even compared to all of the latest technology, a pinhole camera still gets beautiful results. Find out how this very simple aperture design works to control the way light enters the lens of...

In the lesson, students will create and use a pinhole camera to take a picture and then develop the negative in a darkroom. They will use photo software to change their negative image into a positive one.

Using a simulation of a pinhole camera, try capturing images using different focal distances, and then answer the questions below.

Have you ever thought about making a pinhole camera from an oatmeal box? This fascinating personal site gives directions, with photo examples.

Simple directions to make a pinhole camera from a pringles can! Try this experiment. You'll be surprised at what you find.

Take a look at the history of cameras from the first pinhole camera in the 11th century to the modern day digital camera.

In this lesson, students learn that light travels in a straight line from a light source and that ray diagrams help us understand how an image will be created by a lens. In the accompanying activity, students explore the concepts behind...

Understand how we can calculate the radius of a circle of confusion

Understand the diagram we have created to calculate the radius of a circle of confusion.