This site from the Wikipedia Encyclopedia provides an overview of the life of scientist Henry Moseley. This open-source encyclopedia site discusses his contribution to science and how he found a systematic relation between wavelength and...

Kids learn about the behavior of light as a wave in the science of physics including reflection, refraction, and diffraction.

Source of information on the subject of weather photography. There are great links, images and tips on equipment to use. For the intermediate to advanced photographer.