Waves

Learn about the history of telescopes and the function of refracting and reflecting optical telescopes.

Learn about radio astronomy, a type of astronomy that studies objects in space using radio waves and radio telescopes.

Learn about the history, function, uses, benefits and risks of Ultrasonography as a medical imaging technology.

Learn about telescopes, how they work & why they're important to astronomers.

Ever wondered why we have two eyes (and not one, three or more)? Find how your two eyes work together in this hands-on activity.

Explore how we see things far and near and from different angles. It's all about perspective!

A Canadian researcher built the first voltage-controlled synthesizer in the 1940s.

Learn how sound travels in waves and how it is measured in this backgrounder.

Find out what happens if you spin the colours of the rainbow in this hands-on activity.

Rainbows are beautiful examples of optics in nature. We see them thanks to the reflection and refraction of visible light and water.

Learn about the different types of radiation, how they interact with atoms and how they can affect you.

What is the difference between sound and noise? How do they affect your hearing? And is noise always a bad thing?

Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!

7 images of some objects that can reflect light such as mirrors, Mylar balloons and water

What does light have to do with colour? Observe some colourful fruit under different conditions to learn why we see the colours we see!