This Week in the Classroom: 3D Printed Pinhole Camera

Last spring, I had the opportunity to teach one of my dream units:  Light and Waves.  We completed three projects during this time: camera obsuras, cajon drums and a pinhole camera. This 3D-printed pinhole camera combines three centuries worth of … Continue reading This Week in the Classroom: 3D Printed Pinhole Camera

This Week in the Classroom: The Camera Obscura

The camera obscura is a old, old project which illuminates the nature of light.  Students can discover some major scientific principles: light travels in straight lines, transparent surfaces allow light to travel through while translucent surfaces let some light through, the principles behind photography, scale, proportion and a whole host of other things.

cc wikipedia

 

Essentially, a camera obscura is a black box with a very small hole piercing one wall.  This hole allows a small amount of light to enter the box.

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Now here’s where it gets funky.  We need to know two rules about light to understand what happens next.  First, light travels in a straight line.  Second, light reflects off all objects – it’s the reflected light which our eyes process into visual images.  So what happens if light is made to travel through a extremely small space?

An illustration of how a camera obscura works. cc wikipedia

Continue reading “This Week in the Classroom: The Camera Obscura”