Solution: Cesium was discovered in natural mineral waters in
Chapter 7, Problem 7.152(choose chapter or problem)
Cesium was discovered in natural mineral waters in 1860 by R. W. Bunsen and G. R. Kirchhoff using the spectroscope they invented in 1859. The name came from the Latin caesius (sky blue) because of the prominent blue line observed for this element at 455.5 nm. Calculate the frequency and energy of a photon of this light.
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