spectral line

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Balmer series of hydrogen spectral lines

visible solar spectrum

energy levels for hydrogen

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Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day

Estimated Battle Casualties During the Normandy Invasion and Campaign to Liberate Paris (June–August 1944)

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.

Why Is It Called Black Friday?

San Francisco, California/USA-1/18/20: Womens March at Civic Center marching with signs of political protest regarding equality also embracing 2020 presidential candidates and celebrating equality

How Does the U.S. Government Define the Difference Between a Protest and a Riot?

Paul Revere. "The bloody massacre perpetrated in King Street Boston on March 5th 1770 by a party of the 29th Regt.," engraved by Paul Revere. Boston Massacre.

There’s a Riot Goin’ On: Riots in U.S. History (Part One)

Statue of Nostradamus

Nostradamus and His Prophecies

spectral line: Related Content

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Photos

Balmer series of hydrogen spectral lines

visible solar spectrum

energy levels for hydrogen

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Topics

absorption line emission line spectral line series fine structure Rydberg constant Balmer series series limit Brackett series Lyman series Paschen series Zeeman effect Stark effect Stokes lines line broadening

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Key People

Fraunhofer, detail of an engraving

Joseph von Fraunhofer

German physicist