Light is something we experience every day. For most people, “light” refers to what humans can detect with our eyes. It is illumination, what ignites our visual sense, the yin to the yang of dark. However, the type of light humans can detect with our eyes is just a small fraction that exists, and the true nature of light is much more expansive. In many ways, light behaves like a wave and this is the key to understanding its amazing capabilities. How tightly packed – or far ap
Remember when you had to rely on seeing just a part of yourself in the reflection of a dark lake or in a small expensive piece of polished copper or silver-mercury? Probably not. I know that I, for one, take the highly reflective and often inexpensive modern mirrors for granted, not to mention the panoply of high-resolution cell phone cams, web cams and other photography and video cameras that can show us what we look like from head to toe at any given moment. Kim Kardashian
Light might seem like a simple concept. We wake up every morning, and sooner or later the Sun rises and things get "light." Or, we walk into a dark house and flick a switch and where there was once darkness, there is now light. But what exactly is light? Despite being 93 million miles from the Earth, the Sun delivers approximately 5 trillion giga-joules of energy to the Earth's surface every year. Credit: NASA/JSC Light is so much more than the “either/or” of illumination.
Credit: NASA/JSC Light takes on many forms – including radio waves, ultraviolet, X-rays, and more – that are invisible to us and largely undetectable without modern technology. Since scientists began discovering there were “other” types of light at the start of the 19th century, they have been working to figure out ways to harness its potential. Today, it’s hard to overestimate how much we rely on light and how it plays a key role in the development of the world’s economies