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Evidence of glass during the chalcolithic has been found in Hastinapur, India. [19] The earliest glass item from the Indus Valley civilization is a brown glass bead found at Harappa, dating to 1700 BCE. This makes it the earliest evidence of glass in South Asia. [3] [20] Glass discovered from later sites dating from 600 to 300 BCE displays ...
Joseph Ritter von Fraunhofer (/ ˈ f r aʊ n ˌ h oʊ f ər /; German: [ˈfraʊnˌhoːfɐ]; 6 March 1787 – 7 June 1826 [1]) was a German physicist and optical lens manufacturer. He made optical glass, an achromatic telescope, and objective lenses.
Friday, April 22nd marks Earth Day 2022, and while we’re not limiting our pledge to live a little greener to a single day a year, it marks a great opportunity to teach our kids about living ...
A glass building facade. Glass is an amorphous (non-crystalline) solid.Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics.
Earth Day is an annual event on April 22 to demonstrate support for environmental protection.First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries.
The 300-plus-year-old glass onion bottles were discovered from the ... 2016 documentary following modern-day treasurer hunter and team searching for sunken ship (available on Amazon Prime Video)
It has been proposed that glass eye covers in hieroglyphs from the Old Kingdom of Egypt (c. 2686–2181 BCE) were functional simple glass meniscus lenses. [40] The so-called Nimrud lens, a rock crystal artifact dated to the 7th century BCE, might have been used as a magnifying glass, although it could have simply been a decoration. [41] [42 ...
Trinitite, also known as atomsite or Alamogordo glass, [1] [2] is the glassy residue left on the desert floor after the plutonium-based Trinity nuclear bomb test on July 16, 1945, near Alamogordo, New Mexico.