In nature, one never finds the ideal plane waves described in textbooks. Real physical waves, such as light beams, spread, diffract, scatter and interfere in complex and chaotic ways. An intriguing ...

Light travels incredibly quickly. But just how fast is it? Microwaves and light waves move at the same speed, so if you have a microwave oven, you can work out the speed of light yourself.

"Since it is a direct prediction of Einstein's theory of general relativity, its observation would serve as a ... massive objects warping space-time can generate ripples that travel across the ...

Researchers now think that gravitational memory could be written on photons all over the cosmic microwave background—the oldest radiation in the universe. Though gravitational memory is thought to be ...

These observations, first made by Philipp Lenard in 1902, gave a startling twist to the story! The mystery was finally resolved by Albert Einstein in 1905, while working as a clerk in the Swiss Patent ...