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.
Reflection and Refraction
Learn about reflection and refraction and meet Emily Altiere, a PhD student in physics who studies lasers.
Light and Its Properties
Learn about light and its properties.
Optical Telescopes
Learn about the history of telescopes and the function of refracting and reflecting optical telescopes.
Ultrasonography
Learn about the history, function, uses, benefits and risks of Ultrasonography as a medical imaging technology.
Thermal Imaging
Learn about uses of thermal imaging as a medical imaging technology.
Radiography & X-ray Imaging
Learn about radiography and x-rays as a form of medical imaging technology.
Gamma Rays: Helper or Hazard?
Gamma rays might make you think of cancer, harmful radiation or superheroes. But gamma rays have lots of uses: food safety, manufacturing and even medicine!
Sound vs. Noise
What is the difference between sound and noise? How do they affect your hearing? And is noise always a bad thing?
What's in a Rainbow?
Rainbows are beautiful examples of optics in nature. We see them thanks to the reflection and refraction of visible light and water.
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?
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.
What If You Could Charge Your Phone Using Radio Waves?
Could we use radio waves to charge electrical technologies in the future?
Who Created the Electronic Synthesizer?
A Canadian researcher built the first voltage-controlled synthesizer in the 1940s.