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Waves, Sound, Light

The Jodrell Bank Lovell Telescope located in Cheshire, England

Telescopes and Astronomy

Visible light is only part of what astronomers study. They use different types of telescopes to study the entire electromagnetic spectrum.

Skyglow from a city and highway

Light Pollution

Light can be a type of pollution. Learn about the damage it causes to people and living things as well as how you can prevent it.

Large diamond refracting light

Reflection and Refraction

Learn about reflection and refraction and meet Emily Altiere, a PhD student in physics who studies lasers.

Abstract light pattern

Light and Its Properties

Learn about light and its properties.

Boy looking through telescope at night

Optical Telescopes

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

Ultrasound treatment on knee


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

hermographic image a woman’s head and neck

Thermal Imaging

Learn about uses of thermal imaging as a medical imaging technology.

dental x-ray

Radiography & X-ray Imaging

Learn about radiography and x-rays as a form of medical imaging technology.

 Sound waves and sound-producing devices. Image © jop_pop,

Sound vs. Noise

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

Colourful sunglasses

How Do We See Colour?

How does the human eye see visible light as colour? And why do some people see more colours than others?

woman with camera

Eye vs. Camera

The human eye lets us see the world by sending impulses to our nervous system. In many ways, it is very similar to other optical devices, including cameras.

​​​​​​​The Electronic Sackbut Synthesizer

Who Created the Electronic Synthesizer?

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

Circle of colours

What is white light?

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

Why is everything so small down there?

Why is everything so small down there?

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