Flame Colours and Spectroscopy

The video explores the evolution of spectroscopy, starting with Bunsen's flame tests and advancing to Kirchhoff's spectroscope, which allowed for precise element identification. This led to the discovery of cesium and rubidium. The video also covers the discovery of helium during a solar eclipse by Jansen and Lockyer, highlighting the power of spectroscopy in identifying new elements.

What new element was discovered during the total solar eclipse in 1868?

What was the significance of the yellow line observed by astronomers during the eclipse?