Illuminating the world around us
Light is everywhere, yet its true nature and profound impact often go unnoticed. Join in on a journey to understand the science behind light, from its incredible speed to how it paints our world with vibrant colours.
The unravelling of light's mystery
Light is much more than just what we see. It's an electromagnetic wave, a form of energy that travels through space at an astonishing speed, measured at approx 300,000 metres (or 180,000 metres) per second!
For centuries, scientists have unravelled its secrets, revealing how it interacts with matter, carries information, and ultimately shapes our perception of reality. Understanding light is understanding a fundamental aspect of our existence.
The incredible speed of light
Imagine something so fast that it could circle the Earth seven and a half times in just one second.
That's the speed of light!
At 299,792,458 metres per second in a vacuum, it is the fastest thing in the universe, a cosmic speed limit that underpins many laws of physics.
This constant speed allows us to measure vast astronomical distances and is crucial to technologies like fibre optics and satellite communication.
How we perceive a world of colour
From the deep blue of the sky, which is what's known as RAYLIEGH SCATTERNG, to the vibrant greens of nature, our world is rich with colour, all thanks to light. But how do we actually see these colours?
It all comes down to how light waves interact with objects and our eyes. Objects absorb certain wavelengths of light and reflect others. The reflected wavelengths are what our eyes detect, and our brains interpret these as specific colours.
Delve deeper into this fascinating process and understand the magic behind our visual experience.