If you are one of those curious fellows who snoops into great-grandpa’s attic in search for some prehistoric relics from his time, perhaps you once came across and pondered over a strange looking GE incandescent light bulb that was long stored away for future use and then forgotten. Using this site, you will be able to learn why your typical 60-watt incandescent light bulb that lights up your bedroom is NOT the same light bulb that Thomas Edison “invented.” You will also learn how it differs from Thomas Edison’s first successful electric lamp and trace the evolution of General Electric light bulbs since they first were commercially sold in 1879.
This site can help you answer those questions and many more and also give you an overall history of some of the light bulbs produced by General Electric.
Create a model of radioactive decay using dice and test its predictive power on dating the age of a hypothetical rock or artifact. That is what we encounter in our daily lives, right?
The Earth orbits the Sun in about one year's time, the Earth rotates on its axis every 24 hours, 60 ticks of the second hand on a clock indicates 1 minute has passed.
S., governmental and international customers include: In 2000, IPS’s Walter Rantanen was approached by Paul Messier to see if he could analyze the paper fibers in several purported vintage Louis Hine photographic prints from the 1930s to determine if the paper was consistent with the photographic papers available in this time frame.
Rantanen examined a large number of photos that were carefully dated to determine what fiber species and pulping processes were used from the early 1900s through the late 1990s.
Geologists use those radioactive isotopes to date volcanic ash or granite formations like the giant Half Dome in Yosemite National Park.
Yes, radioactive isotopes present in rocks and other ancient material decay atom by atom at a steady rate, much as clocks tick time away.
No longer did people have to restrict their daily tasks during the time the sun was up.
The electric light bulb greatly extended both our working and leisure hours well into the evening and beyond.
While exact age dating of papers is not possible, the process is often able to exclude samples as being made in the time period of question.
Walter Rantanen has developed a large database of paper with known ages.
The light bulb has so many uses but we seldom wonder how we had ever gotten along without it.