A new experiment has demonstrated something that sounds physically impossible – light itself casting a shadow. It turns out that if you manipulate a laser just right, then hit it side-on with another ...

In the experiment, a high-power green laser passed through a ruby cube, illuminated from the side by a blue laser. The green laser increased the ruby’s absorption of the blue light, creating a darker ...

A total solar eclipse will darken a swath of North America as the Moon blocks the light of the Sun for a few minutes on April 8, 2024. In addition to casting a breathtaking, passing shadow over the ...