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 ...

Human vision relies on light. After reflecting off surfaces, light enters into the eyes and travels through the cornea and pupil to produce an image on the retina. The eye is sensitive to a broad ...

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 post sponsored by Texas Instruments. The OPT3001 sensor accurately measures the intensity of light visible to the human eye regardless of light source. Its precision spectral response tightly ...

This project uses a simple LDR that is calibrated against a reference photometer in order to build a digital lux meter. This project uses a simple LDR that is calibrated against a reference photometer ...