Does light behave more like a particle, or like a wave? Today we know the surprising answer. Here's why it took so long to ...

The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio waves, microwaves, visible light, ...

Find out more about sound waves and pitch. What is light? Light comes from different sources, like lamps, bulbs and the sun. Find out more about how light travels. What is reflection? When light ...

Researchers have forced light to travel in very different and unusual ways. Using nifty engineered chip-nanostructures, they ...

is the change in direction of a wave at a boundary. When light is refracted as it enters a prism, each colour is refracted by a different amount. Because each colour has a different wavelength ...