Following the passage of Hurricane Florence’s remnants, the skies over New Jersey, USA, treated onlookers to an extraordinary spectacle: a dazzling display of supernumerary rainbows. This ethereal phenomenon, appearing in the direction opposite the sun, showcases a lesser-known aspect of light’s interaction with water and offers a glimpse into the wave-like nature of light itself.
A Symphony of Colors in a Damp Sky
On October 4, 2026, what began as a post-storm clearing transformed into a celestial light show. For approximately half an hour, vibrant bands of supernumerary rainbows shimmered and faded, with at least five distinct arcs captured in a single photograph. This captivating event, witnessed and photographed by observers on the Jersey Shore, highlights the precise atmospheric conditions required for such a breathtaking display.
The Science Behind the Spectacle
Supernumerary rainbows are not your everyday rainbows. They emerge when falling water droplets are remarkably uniform in size, typically less than a millimeter in diameter. Under these specific conditions, sunlight not only reflects off the inner surface of the raindrops but also undergoes interference. This wave phenomenon, akin to the patterns created by ripples on a pond, is crucial to their formation. The existence and study of supernumerary rainbows in the early 1800s provided significant early evidence for the wave theory of light, a fundamental concept in modern physics.
Source: NASA
