Tungsten is one of the hardest metals on the earth, and many scientists compare it to diamond. Tungsten is a dull silver-colored metal with the highest melting point of any pure metal. Pure tungsten melts at a whopping 6,192 degrees F (3,422 degrees C) and won’t boil until temperatures reach …

Optical communications make use of light waves, very high frequency (100 terahertz) electromagnetic waves, for information transmission. Modern optical communications were begun in the 1960s, when lasers were invented as a coherent light source. Since then, the rapid development of photonic technologies has made possible optical communication links with a …

We see things because our eyes are sophisticated light detectors: they constantly capture the light rays bouncing off nearby objects so our brain can construct an ever-changing impression of the world around us. When our eyes see a three-dimensional image such as apple, Light reflects off the surface of the apple …