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 ...

Light is a type of electromagnetic radiation that can be detected by the eye. It travels as a transverse wave. Unlike a sound waves, light waves do not need a medium to pass through, they can ...

In 1923, Arthur Compton proved that X-rays colliding with electrons ... We now know the photons that make up light are not ...