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 ...

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 ...

How does one go about measuring the amount of light in a given area? With a Light Meter of course! Maintaining proper lighting levels can be very important in places like schools, hospitals and even ...

Gauging the amount of light that's in a scene is one of the most fundamental and important skills for a photographer to have. Knowing how to set the exposure on a camera will produce a picture that's ...

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 ...

LEDs are known for their low power consumption and long lifetime (50,000 to 80,000 hours), but there are still some issues when it comes to the materials they are built from. In this growing market, ...