After a test run with confusingly coincidental origins, a massive blue laser will once again light up Grace Cathedral this month. Illuminate — the arts nonprofit that lit up the Bay Bridge — and the ...

We may earn a commission from links on this page. Recently, players fighting for democracy in online co-op sci-fi shooter Helldivers 2 have spotted strange blue lasers flying across the sky. Others ...

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 ...