neutral filter

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Car with a pickle design in the Zagreb Red Bull Soapbox Race, Zagreb, Croatia, September 14, 2019. (games, races, sports)

10 Unusual Sports

Portion of the Aleppo Codex, a manuscript of the Hebrew Bible written in the Hebrew language in the 10th century CE; in the Shrine of the Book, Israel Museum, Jerusalem.

Why Do Languages Die?

pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)

13 Questions About How the Human Body Works Answered

Salem Witch Trials. Photogravure after the painting by Walter McEwen titled - The Witches - circa 1890s.

How Rye Bread May Have Caused the Salem Witch Trials

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Lake Mead (the impounded Colorado River) at the Hoover Dam. The light-coloured band of rock above the shoreline shows the decrease in water level in the first few years of the 21st century.

6 Lakes That Are Drying Up

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

neutral filter

optics

Learn about this topic in these articles:

manufacture and optical properties

In optics: Filters and thin films
A neutral filter absorbs all wavelengths equally and merely serves to reduce the intensity of a beam of light without changing its colour.
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