The constancy of the speed of light is a pillar of modern physics, but questions persist about its absolute universality.

Discover the art and science of light at Glow at the Exploratorium! Enter for your chance to win a Curious Family Membership ...

US-Italy researchers have used quantum-mechanical simulations to resolve a decades-old puzzle about how ultraviolet ...

Physicists using near-absolute-zero detectors have reached unprecedented sensitivity in the hunt for light dark matter. A ...

Quantum physics is the realm of the strange. And one of the strangest discoveries in the field is also one of the most fundamental: Particles fired at barriers with two slits in them can act like ...

The effect, first predicted over 60 years ago and regarding objects traveling near the speed of light, has been lent support ...

Green light means “go.” That might apply to evaporating water molecules too. Visible light, especially that of a greenish hue, might spur water to evaporate, researchers report in the Nov. 7 ...

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 ...

From a telescope network that spans much of the globe to a psychology study that spans 67 countries, here are the biggest science experiments on the planet. When you purchase through links on our site ...

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 get there. When you purchase through links on our site, we may earn an ...