Ok, it's been almost a decade since I've had to study Maxwell's equations, but I remember a certain facet from those equations that always astounded me. It was the fact that the speed of light could ...

In the days of old, back when television was solely recorded on a thing called “film,” the cinematographer was known as a kind of fortune-teller/ magician who could mysteriously read the light in the ...

Let's start with DC voltage, one of the simplest and most-used multimeter measurements. The DC voltage measurement is used to determine the difference in electrical potential between two points in a ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. You can now use your Windows Phone device as a lux meter thanks to a new app that has just ...

This is our second activity that requires the use of a smartphone or tablet. Please let us know what you think. E-mail editors@sciam.com with feedback about the use of technology in this—and ...

Discover how to build a simple device that converts light into electricity using LEDs and diodes. This step-by-step guide demonstrates assembling an LED-diode cluster, connecting it to a capacitor for ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Thom Dunn Thom Dunn is a writer focusing on home heating and cooling. He once ...

For such measurements, goniophotometers (from the Greek “gonia,” an angle; “photos,” light; and “metron,” measure) have been used by traditional lighting manufacturers for some time. For the most part ...

Most engineers are quite familiar with typical low-power-indicator LEDs, whether they be surface-mount or the classical through-hole packages. All that's needed to use them is a voltage source and a ...