Sunlight looks smooth and white to the naked eye, but when I break it apart with a prism or a spectrograph, it turns out to ...

One of the best visualizations ever produced of the spectrum of light from our glorious Sun reveals some mysterious holes in its array of colors. Most of the thousands of dark Fraunhofer lines in the ...

If you are planning on watching April 8's solar eclipse, you may not have put much thought into what you might wear. This is because you may not have heard about the Purkinje effect, a natural ...

Solar cells are made from semiconductors whose ability to respond to light is determined by their band gaps (energy gaps). Different colors have different energies, and no single semiconductor has a ...

If you cast your mind back to school and can remember when your teacher shone light through a prism to create an artificial rainbow, then you'll probably already know the answer to this question. "The ...