LightAlbert Eistein

-"Anyone who has never made a mistake

has never tried anything new."

Done by: Cheyenne Chia (3) Cheryl Chia (4)

Defining the nature of lightEinstein solved the first major problem in physics with the first paper of his miracle year, the paper on the light quantum.

German physicist Max Planck had used a mathematical trick to explain radiation in the ultraviolet part of the spectrum; he bundled light into quanta of energy. In the first paper of 1905, Einstein made Planck's quanta a property of light and of all electromagnetic radiation (radio waves, x-rays, ultraviolet and infrared light, and so on). It isn't that light is lumpy in some instances. Light is always lumpy, like a particle. It comes in bundles. The light emitted by hot objects isn't somehow split into these bundles. Light is made up of these bundles, these photons as they are called, that can't be split.

By making lumpiness a property of light, Einstein paved the way for the development of quantum theory that would take place in the 1920s. Quantum theory would later explain that light is both a wave and a particle. Light behaves like a wave under certain conditions, and under other conditions, it behaves like a particle. Quantum theory integrates both behaviors seamlessly.

Even though Einstein's first paper was read with a great deal of interest, most physicists didn't believe his idea of photons of light, including Planck himself initially. For the next 15 years, Einstein was almost the only one who believed in the light quantum idea. But quantum theory, developed by other physicists in the 1920s based on Einstein's work, would become the most successful physics theory ever.

Defining the nature of light

Quantum theory of lightIn March 1905 , Einstein created the quantum theory of light, the idea that light exists as tiny packets, or particles, which he called photons. Alongside Max Planck's work on quanta of heat Einstein proposed one of the most shocking idea in twentieth century physics: we live in a quantum universe, one built out of tiny, discrete chunks of energy and matter

in June, Einstein completed special relativity - which added a twist to the story: Einstein's March paper treated light as particles, but special relativity sees light as a continuous field of waves. Such a contradiction took a supremely confident mind to propose. Einstein, age 26, saw light as wave and particle, picking the attribute he needed to confront each problem in turn.

Albert Einstein is like the father of modern physics. The theories he developed has made a revolutionary change for physics. Einstein published more than 300 scientific papers along with over 150 non-scientific works. This amount of scientific work he has done throughout his life is indeed admirable, and is something we can learn from. His perseverance has impacted many of us, and the world of Physics.

What we should learn from him

What we learntQuantum theory tells us that both

light and matter consists of tiny particles which have wavelike

properties associated with them. Light is composed of particles called

photons, and matter is composed of particles called electrons,

protons, neutrons. It's only when the mass of a particle gets small

enough that its wavelike properties show up.

Troubles we faceWhen we researched about Albert

Einstein, we did not understand most of the information we

collected, and we had a hard time figuring out what it meant. We used various ways to find it’s

meaning by searching up each terms, and finally understood it.

Also, Albert Einstein is famous for discovering atoms, and there were

not many sites talking about his discovery on light.

CREDITS (≥ ≤)∇ ノ • Wikipedia • Google• http://www.dummies.com/how-to/content/einstein-s

torms-the-scientific-world.html