Conventional curved lenses, which direct light by refraction in glass or plastic, are often bulky and heavy, offering only ...

But since he knew light was a wave composed of changing magnetic and electric fields, it couldn't truly be still. "One sees in this paradox the germ of the special relativity theory is already ...

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.

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 ...