Light is something we use and need every day. It is a form of energy that allows us to see all around us! Lots of different sources produce light. Earth's main source of natural light is the Sun.

Anshu explores his bedroom as his eyes become accustomed to the dark, noticing the different light sources from inside his room, his house and outside his house. Whilst watching this clip ...

The emergence of convenient sources of broadband light spanning the visible and near-infrared is proving increasingly useful for applications involving spectroscopy, imaging and metrology ...