Einstein's Blackboard, Historical blackboard in Oxford, United Kingdom.
The preserved blackboard displays Albert Einstein's original chalk equations and calculations from his 1931 cosmological lecture series at Oxford University, featuring mathematical formulas related to the expansion, density, radius, and age of the universe.
Einstein used this blackboard during his second Rhodes Memorial lecture on May 16, 1931, at Oxford University, where he presented his theories on the Friedmann-Einstein universe model and received an honorary Doctor of Science degree.
The blackboard represents a tangible connection to Einstein's intellectual legacy and serves as a symbol of traditional scientific communication methods that predate modern digital technology in academic discourse.
Visitors can view the blackboard in the basement gallery of the Museum of the History of Science in Oxford, where it remains displayed as a framed historical artifact with original chalk markings still visible.
The blackboard contains systematic errors in Einstein's calculations, including overestimations of the Hubble constant and matter density, which provide insight into the challenges faced by early 20th-century cosmologists.
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