At ARVO 2025, in Salt Lake City, Utah, Carly Lam, PhD, MSc, and Tsz Wing Leung, PhD talked about the evaluation of the visual ...

What is the green flash? It’s often tied to pirate folklore but also commonly occurs in reality – learn what causes the flash ...

Only in Allentown. Only in Allentown could the creative spirits of the past and present come together to launch a public art ...

Ukrainian polar explorers from the Antarctic Station Akademik Vernadsky filmed the phenomenon of parhelion - when three Suns ...

The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don’t always think about.

The quirks of light moving through gas are the cause of stellar twinkling, which can be a bane—and sometimes a boon—for ...

The film covers topics such as the speed of light, the principles of reflection and refraction, the functioning of lenses and prisms, and the nature of different types of light, including lasers.

Prism glasses use refraction, which means they bend light to change its direction before it meets the eye. If someone has double vision, prism glasses can redirect where light meets the eye ...

I was sitting on the couch and caught a rainbow on the cushion next to me. The rainbow showed up because of something called prism refraction. The window I was sitting near had a beveled or slanted ...

The experiments measure the index of refraction directly, for normal incidence, on prisms with three different apex angles. Snell's Law and the measured index are then used to verify refraction for ...

Prism lenses, despite their name, have no focusing power. They don't correct refractive errors like farsightedness (hypermetropia) or nearsightedness (myopia). Their purpose is to change the ...