Einstein's impact on Light. Presentation Transcript
-"Anyone who has never made a mistakehas never tried anything new."
Einstein solved the first major problem inphysics with the first paper of his miracle year,the paper on the light quantum.German physicist Max Planck had used a mathematical trick toexplain radiation in the ultraviolet part of the spectrum; hebundled light into quanta of energy. In the first paper of 1905,Einstein made Plancks quanta a property of light and of allelectromagnetic radiation (radio waves, x-rays, ultraviolet andinfrared light, and so on). It isnt that light is lumpy in someinstances. Light is always lumpy, like a particle. It comes inbundles. The light emitted by hot objects isnt somehow splitinto these bundles. Light is made up of these bundles, thesephotons as they are called, that cant be split.
By making lumpiness a property of light, Einstein paved the wayfor the development of quantum theory that would take place inthe 1920s. Quantum theory would later explain that light is botha wave and a particle. Light behaves like a wave under certainconditions, and under other conditions, it behaves like a particle.Quantum theory integrates both behaviors seamlessly.Even though Einsteins first paper was read with agreat deal of interest, most physicists didnt believehis idea of photons of light, including Planck himselfinitially. For the next 15 years, Einstein was almostthe only one who believed in the light quantumidea. But quantum theory, developed by otherphysicists in the 1920s based on Einsteins work,would become the most successful physics theoryever.
In March 1905 , Einstein created the quantumtheory of light, the idea that light exists as tinypackets, or particles, which he called photons.Alongside Max Plancks work on quanta of heatEinstein proposed one of the most shocking idea intwentieth century physics: we live in a quantumuniverse, one built out of tiny, discrete chunks ofenergy and matterin June, Einstein completed special relativity -which added a twist to the story: EinsteinsMarch paper treated light as particles, butspecial relativity sees light as a continuous fieldof waves. Such a contradiction took asupremely confident mind to propose.Einstein, age 26, saw light as wave and particle,picking the attribute he needed to confronteach problem in turn.
Albert Einstein is like the father ofmodern physics. The theories hedeveloped has made arevolutionary change for physics.Einstein published more than 300scientific papers along with over150 non-scientific works. Thisamount of scientific work he hasdone throughout his life is indeedadmirable, and is something wecan learn from. His perseverancehas impacted many of us, andthe world of Physics.