Light Propagation: Greek Eratosthenes (3rd century BC) calculated the radius of the earth using the shadow of the sun on the day of the summer solstice(Light Propagation: Greek Erathostene (3rd century BC) calculated the radius of the earth using the shade of the sun on the day of the summer solstice. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
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Undated · Engraving
· Picture ID: 925409
colour · colours · engraving · physical · knowledge · greek · experience · history · light · astronomy · antique greece · greek · grece · world · antiquite · bianchetticor · energy · energy · Private Collection / Bridgeman Images |
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