Aleksandr Stoletov
A pioneering Russian experimentalist who discovered the photoelectric effect and laid the groundwork for modern electronics.
1839–1896 (age 57)·Russian physicist·Birthday: August 10
Biography
In a Moscow University laboratory, Alexander Stoletov built the instruments that would capture one of nature's most elusive interactions. While others theorized, Stoletov was a hands-on pioneer of precision measurement, obsessed with the relationship between light and electricity. His crowning work was a brilliantly simple setup—a circuit with a zinc plate in a vacuum—that allowed him to demonstrate in 1888 that ultraviolet light could liberate electrons, a phenomenon later known as the photoelectric effect. This discovery was a cornerstone of quantum physics, though Stoletov himself worked in the age of Maxwell. A fierce advocate for science in Russia, he founded the first university physics laboratory and helped establish electrical engineering as a serious discipline. His legacy is that of the meticulous experimenter who first saw the spark of a new physical reality.
#1 When Aleksandr Was Born
The biggest hits of 1839
Aleksandr's Life & Times
The world at every milestone
1839Born
1844Started school
1852Became a teenager
1855Could drive
1857Could vote
1860Turned 21
1869Turned 30
President: Ulysses S. Grant
1879Turned 40
President: Rutherford B. Hayes
1889Turned 50
Eiffel Tower opens in Paris
President: Benjamin Harrison
1896Died at 57
First modern Olympic Games held in Athens
President: Grover Cleveland
Key Achievements
- Conducted the first detailed experimental study of the photoelectric effect in 1888, establishing its fundamental laws.
- Founded the first physical research laboratory at Moscow University, revolutionizing science education in Russia.
- Made significant contributions to the study of magnetism, particularly the magnetization of iron.
- Played a foundational role in establishing electrical engineering as an academic discipline in the Russian Empire.
Did You Know?
His brother, Nikolai Stoletov, was a famous Russian general who fought in the Russo-Turkish War.
He faced significant opposition from conservative factions within the Imperial Academy of Sciences, which blocked his membership.
The Stoletov curve, which describes the magnetization of ferromagnets, is named for his work.
He was also a talented musician and considered a career as a concert pianist before dedicating himself to physics.
“I measured the photoelectric effect with a quadrant electrometer of my own design.”
