This activity from the Exploratorium provides an introduction to the diffraction of light which indicates its wavelike properties. Two pencils are used to create a slit through which a flashlight bulb or candle’s light...

This article from SPIE discusses an electron-beam-lithography technique which fabricates diffractive optical structures such as classic Fresnel-zone-plate lenses with fine features. Diffractive optical elements are...

This resource will demonstrate the inverse square law to students and will show that this law applies to both the intensity of light and the force of gravity. The relative amount of sunlight received in the vicinity of...

Authored by Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section describes general properties of light, frequency, the spectrum, and temperature....

This online encyclopedia explains the terms and principles of laser physics and technology. It also includes content from other topics such as general optics and optoelectronics, nonlinear optics, quantum optics, fiber...