H-alpha (HÎ±) is a specific deep-red visible spectral line in the Balmer series created by hydrogen with a wavelength of 656.28 nm, which occurs when a hydrogen electron falls from its third to second lowest energy level.herefore, the H-alpha line occurs where hydrogen is being ionized. The H-alpha line saturates (self-absorbs) relatively easily because hydrogen is the primary component of nebulae, so while it can indicate the shape and extent of the cloud, it cannot be used to accurately determine the cloud's mass.
Seven Years War (1756-1763) The Seven Years War was the first global conflict. It had two main fronts. The first, in Europe, was the hostility between Prussia and Austria, still simmering after the War of the Austrian Succession , which expanded through alliances to include all of Europe.
Great War & Jazz Age (1914-1928). This song was meant to express the voice of children during World War I: We want our Daddy dear, back home (Hello Central, give me France). World War I Ended With the Treaty of Versailles June 28, 1919. World War I (1914-1918) was finally over. This first global conflict had claimed from 9 million to 13 million lives and caused unprecedented damage. Germany had formally surrendered on November 11, 1918, and all nations had agreed to stop fighting while the terms of peace were negotiated. On June 28, 1919, Germany and the Allied Nations (including Britain, France, Italy and Russia) signed the Treaty of Versailles, formally ending the war.