The United Nations (UN) General Assembly 68th Session proclaimed 2015 as the International Year of Light and Light-based Technologies (IYL 2015). To celebrate this we've pulled out some of our best articles & videos looking at the basics of light, light in nature, lasers & energy!
It took researchers about 400 years to finally agree on these figures. Let's have a brief look at how this research got started.
A fun video about light & sound from the perspective of a science fan... rather than a "proper" scientist.
During photosynthesis plants absorb visible light, mainly through the pigment chlorophyll, and use its energy to convert carbon dioxide and water into sugars required for metabolism and growth.
Nature's spectacular light show in the sky is solar powered.
What happens when water and light meet? It's a rainbow!
The word laser is actually an acronym that stands for light amplification by stimulated emission of radiation.
I've heard a green laser beam is visible, but a red one is not. Why is this?
A teacher and his class use solar energy to power their classroom!
Hank explains the power of solar energy and describes how it may fit into our diversified energy future.
As heat energy moves from one object to another, some of it can be siphoned off to do your bidding. (read about the original Canada Wide Science Fair entry for this project!)