Besim dina biography of albert einstein

When Albert’s grandmother saw him for the first time she is said to have cried continuously: “Much too thick! Electrons emitted in this manner can be called photoelectrons.

The work function of an element is the minimum energy needed to remove an electron from the solid element. He did not like lessons in grammar school as they were held with strict discipline and as he was forced to learn.

After this theory was proven right in an experiment in 1919 (deflection of light by the sun’s gravitational field) Einstein became famous over night. In 1909 he became professor for theoretical physics at the University of Zurich. Each photon has an energy \(E = h\nu\), where \(h\) is Planck's constant and \(\nu\) is the frequency of light.

Since the velocity of the light is fixed for both, he concluded that the distances and time intervals each observer measured must be different. The work was so impressive that historians call 1905 Einstein's annus mirabilis, or "miracle year."

Brownian motion: a speck of pollen (yellow dot) getting moved by molecules of water (black dots)

Brownian Motion

The first was a theoretical explanation of Brownian motion.

He never bothered about mathematics at all."\(^\text{[2]}\)

Mass-Energy Equivalence

Einstein's most famous formula (and arguably the most famous formula in physics) is \(E = mc^2\). Because of his fear that Germany was working on atomic bombs he wrote a letter to Franklin D. Roosevelt, the president of the United States of America, to tell him about the possibility of atomic weapons.

(That is, give \(k,\) when your answer is of the form \(a \times 10^k\) joules.)

For comparison, the atomic bomb detonated over Nagasaki released \(8.8 \times 10^{13}\text{ J}\).

The correct answer is: 14