On cold, sunny days, tiny ice crystals in the atmosphere can create breathtaking displays like halos, sundogs, and light pillars.

One of the discoveries that fundamentally distinguished the emerging field of quantum physics from classical physics was the ...

Sir Chandrasekhara Venkata Raman and his student Nagendra Nath published a series of papers in 1936 on the diffraction of light by a liquid in the field of a high frequency sound wave. This was ...

MISSOULA, Mont. — While up in the mountains, have you ever looked down on a cloud or fog bank below and seen concentric rings of light surrounding your shadow? A viewer recently shared a photo of this ...

This novel finding regarding the nonreciprocal diffraction of acoustic waves could open doors for next-generation communication devices. A unique propagation phenomenon of acoustic waves has been ...

At least three separate optical phenomena are visible in the new images. Each of which is created by light refracting through millions of perfectly aligned ice crystals in the upper atmosphere. When ...

The dazzling spectacle unfolded in a matter of minutes, but its short-lived appearance has left an indelible mark on those lucky enough to witness it. Jenni Shaw, who was at her family-owned business ...

Residents of Russia's Sakhalin region were treated to a surreal sight recently: what looked like two suns rising side by side in the morning sky. The .

Near-field optics operates on the principle that when light interacts with objects smaller than its wavelength, it can produce an evanescent wave that decays exponentially with distance but provides ...

New diffraction phenomenon of acoustic waves. A novel asymmetric diffraction has been achieved using a nano-patterned array of ferromagnets. This demonstration arises from a unique interaction between ...