The ‘sluggish’ photon

What is sunlight? How is it created, and how much time does it take for it to arrive on Earth?

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The focus of a jar

Studying the focal point of a jar filled with water.

Liquid magnifier

Make a magnifying glass using a jar, some cling foil and a few drops of water.

Which devices do we use infrared light?

You can learn about the use of infrared radiation in our everyday lives.

The film projector

Find out how the images of a film appear on the screen.

What is infrared radiation?

In this lesson you can learn about infrared radiation.

The infrared eye

Is an everyday video camera able to detect frequencies invisible to the human eye?

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