The Beth Sholom synagogue in Elkins Park, designed by Frank Lloyd Wright, is an unusual building even among the famed architect’s unique built works. Some have described it as a spaceship that landed ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...

Using a novel method, beams of laser light can be deflected using air alone. An invisible grating made only of air is not only immune to damage from the laser light, but it also preserves the original ...