Kit yourself out with the best reflective and high-vis cycling gear, and stay safe on your bike in low-light conditions.

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

Discover the science behind seeing your reflection in water. Light travels in straight lines and bounces off smooth surfaces, ...

A typical reflective object sensor consists of an infrared light emitter diode (IRED) and an NPN silicon phototransistor mounted side-by-side on parallel axes in a compact black plastic housing. The ...

The running gods played a cruel trick on us when they made some of the best weather for running into the time of year with the least sunlight. Especially as fall marathon training reaches its peak, so ...