Definition of photoelectric effect: The emission of electron from a metal surface when electromagnetic radiation of a particular frequency incident upon it, this phenomenon is known as the photoelectric effect. The electron ejected out are called photoelectrons. Discovery of photoelectric effect: In 1905 Albert Einstein published in his paper about the Duality of light , i.e., light can act as a particle as well as a wave. Actually, before einstein light was considered as a wave nature, Albert Einstein suggested that light is composed of tiny particles named "quanta" which are massless, chargeless and travel with the speed of light. These quanta particles emit radiation in form of a wave. The photoelectric effect can only be understood if we considered light as a particle. Depth Explanation of photoelectric effect: When electromagnetic radiation of a particular frequency incident on the metal surface the free electrons from the metal ejected out. The free electrons gain en
Introduction:
Whenever we think about great scientists, Albert Einstein is the first name that came into our mind. No doubt he is a legend. He contributed a lot to science and has completely changed our thinking about this universe. So today we are going to know more about this legend, lets get started.
Biography:
Albert Einstein was born on 14th March 1979 in Ulm, Germany. He belongs to a secular family. There were four members in his family, his father, mother, sister Maria and himself. His father name was Hermann Einstein who was an engineer and a salesman at the same time. His mother name was Pauline Koch, a house manager. He married twice, first with his former student Mileva Marie and later with his cousin Elsa. He often described his first wife Mileva as a depressed and jealous woman. He had two sons with Mileva but she had them with her. About his second wife, Albert called their relationship a union of convenience.
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Education Qualification:
At the age of five, Albert joined a Catholic elementary school in Munich for three years. Later, he went to Luitpold Gymnasium at the age of eight where he completed his primary and secondary school education. He never liked school rotted learning and always interested in understanding things.
He was great in mathematics and physics. At the age of 12, he discovered his own proof of Pythagoras theorem by himself. At the same age, he started learning calculus by himself and at the age of 14, he mastered integral and differential calculus. In 1900 he received a bachelor's degree from Swiss Federal Polytechnic and in 1905 a PhD degree from the University Of Zurich.
Great Discoveries:
> Quantum theory of light.
> Special theory of relativity.
> Avogadro's number.
> The Bose-Einstein condensate.
> Wave-Particle duality.
> The photoelectric effect.
> General theory of relativity.
Achievements:
He was awarded the Nobel prize in physics in 1992 for his discovery of the photoelectric effect.
In 1921, he was awarded, Matteucci Medal.
In 1925, Copley Medal for his theory of relativity and for his contributions to quantum theory.
Gold Medal of Royal Astronomical Society (RAS), In 1926. This is the highest award given by RAS.
In 1920, Bernard Medal for Meritorious service to science.
In 1929, Max Planck Medal.
In 1935, Franklin Medal.
Facts about Albert Einstein:
* Albert Einstein's birthday is celebrated as a Genius Day all over the world.
* Einstein never failed in mathematics and physics exams in his life.
* Einstein started speaking after 4 years of his birth. He was eating food with his family, suddenly he said to his mother " soup is hot mom", his family became happy and a little bit shocked.
* He never used to learn his phone number, when asked, he said: " it is not necessary to remember the things which you can found in books easily".
* Although he is a genius yet his memory was very low. He used to forget dates, even his house address.
* Einstein was famous for his equation E=mc^2 also know as mass-energy equivalence.
* Einstein dies after a blood vessel burst near his heart. Internal bleeding starts in his body, but he refused surgery and accept death on 18th April 1955 at the age of 76.
* Although Einstein didn't want that his body or brain is studied, Princeton pathologist Thomas Harvey remove Einstein's brain from his body without permission and kept it for studying it.
*When Einstein's brain was removed from his brain, it was found bigger than an average human brain, there were more cells in Einstein's brain.
Albert Einstein was, is and will always be a great scientist. He is truly a legend. His life can't be summarised in an article.
💓Albert Einstein...
Thanks for reading...
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