Question 1

In which country was Albert Einstein born?

Accepted Answer

Albert Einstein was born on March 14, 1879, in Ulm, in the Kingdom of Wurttemberg in the German Empire. His family moved to Munich when he was an infant. Although Einstein is often associated with Switzerland (where he studied and worked early in his career) and the United States (where he spent his later years), he was born and raised in Germany. Fun fact: Einstein's birthday, March 14 (3/14), is celebrated internationally as Pi Day, since the date matches the first three digits of the mathematical constant pi.

Question 2

What was Einstein's 'Annus Mirabilis' (miracle year), and when did it occur?

Accepted Answer

In 1905, while working as a clerk at the Swiss Patent Office in Bern, the 26-year-old Einstein published four revolutionary papers in the Annalen der Physik. These addressed the photoelectric effect (which proved light has particle-like properties), Brownian motion (providing evidence for atoms), special relativity, and the equivalence of mass and energy (E=mc2). Any one of these papers would have made a career; together they transformed physics.

Question 3

For which discovery did Einstein actually receive the 1921 Nobel Prize in Physics?

Accepted Answer

Einstein was awarded the Nobel Prize in Physics for his explanation of the photoelectric effect, not for relativity. His 1905 paper demonstrated that light consists of discrete packets of energy called quanta (later called photons), explaining why light striking a metal surface ejects electrons only above a certain frequency regardless of intensity. The Nobel committee considered relativity too controversial and not yet sufficiently verified experimentally at the time. Fun fact: Einstein was traveling on a ship to Japan when he learned he had won the Nobel Prize. He gave his Nobel Prize money to his first wife, Mileva Maric, as part of their divorce settlement.

Question 4

What does Einstein's famous equation E=mc2 express?

Accepted Answer

E=mc2, published as part of Einstein's special relativity in 1905, states that energy (E) equals mass (m) multiplied by the speed of light squared (c2). Because the speed of light is such an enormous number (approximately 300,000 km/s), even a tiny amount of mass corresponds to a tremendous amount of energy. This equation underpins nuclear power and nuclear weapons, where small amounts of matter are converted into vast energy.

Question 5

What was the key insight of Einstein's special theory of relativity (1905)?

Accepted Answer

Special relativity rests on two postulates: the laws of physics are identical in all inertial (non-accelerating) reference frames, and the speed of light in a vacuum is the same for all observers regardless of their relative motion. From these deceptively simple premises, Einstein derived revolutionary consequences: time dilation (moving clocks run slower), length contraction, and the equivalence of mass and energy.

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