This time it is a writeup on the best ways to create IR light sources from regular lights. Since normal flashlight bulbs emit a broad enough spectrum to include visible light and IR light ...

Half of sunlight is made up of visible light ... size metal particles designed to absorb infrared light. Hydrogen is a fuel source. The researchers hit upon copper sulfide nanometer particles ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...