Light and Optics: Make A Pinhole Projector to Study Optics

Study optics by building a simple pinhole projector. This is a great precursor to understanding lenses. Then, while you're still outside, go on a pinhole walk looking for natural pinholes--you'll see them everywhere once you know how to find them. 

 

Questions Answered:

What does a shaped pinhole show when it’s held near a screen? 

How can trees make perfectly round circles of light on the ground?

 

Topics Addressed:

Light coming from objects can be projected onto a screen. 

A pinhole will cast an image of whatever is behind it.

 

Materials Needed

Thin cardboard, Foil, Shaped punches, White screen

 

Preparation Time

Cut cardboard frames--kids can do this--they can be reused year to year

 

NOTE: This activity is part of the Light, Optics, & Color Unit found here.

Light and Optics: Make A Pinhole Projector to Study Optics

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    Answer Keys and Teacher Notes address most questions and issues that might arise in this study—you shouldn’t have to do any outside research unless you want to.

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