Many people use wearable devices, such as Apple Watches, to track their fitness goals, but a UM study finds that the devices are better at tracking some types of data than others. The researchers ...

While there are only two types of light to measure (incident and reflective), there are three types of meters a photographer can use: incident, spot, and in-camera reflective.

While there are only two types of light to measure (incident and reflective), there are three types of meters a photographer can use: incident, spot, and in-camera reflective.