## The Legacy of Albert Einstein by Spenta R Wadia pdf free download

The Legacy of Albert Einstein by Spenta R Wadia pdf free download. The epoch making 1905 papers of Albert Einstein, mark a turning point in the history of physics and also the history of mankind. In this respect he shares a platform with Galileo and Newton who gave us the basic formulation of mechanics in terms of forces and accelerations, and with Faraday and Maxwell, who introduced the notion of fields in space and time.

### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

In this hundredth anniversary year we look back and recall the main threads Einstein wove into the tapestry of physics. This collection of articles, The Legacy of Albert Einstein, presents developments whose initiation can be found in the works of Einstein. We have not restricted ourselves to the 1905 papers, but include all his major contributions to physics. Since Einstein was a major public figure of the 20th century we also include this aspect in the collection. One cannot fail to note that one of the most important legacies of Einstein, is the fact that he did not make any conscious value differentiation between different areas of physics.

#### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

He was equally at home with relativity, geometry, radiation theory, Brownian motion, statistics, molecular physics and so on. There was his quest for frameworks and general principles within which the laws of nature operate, and there was an equally important quest

to see how these laws manifest themselves in the world around us. In a deep sense these activities are inevitably mixed up in the grand enterprise to understand our world. We present a glimpse of the scientific contribution of Einstein, which will hopefully provide an overall background to the articles in this book.

##### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

1. Einstein’s Annus Mirabilis: Five Papers that Changed the World The 1905 papers sowed the seeds of both revolutions of 20th century physics:

Relativity and Quantum Theory. Before Einstein there were Newton’s laws of mechanics and Maxwell’s equations of electrodynamics. Thermodynamics was a well established subject and there was Boltzmann’s microscopic formula for entropy.

##### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

• Brownian motion and the reality of atoms:

Einstein’s doctoral dissertation on molecular dimensions, followed by his famous statistical formula for the motion of suspended ‘Brownian’ particles, gave a beautiful method of calculating Avogadro’s number and the size of molecules. Using this framework, the existence of the underlying molecular structure of matter was experimentally concluded beyond doubt, notably by the work of Jean Perrin. Satya Majumdar summarizes Einstein’s original work and its applications to physics, probability theory and computer science.

###### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

• The light quantum hypothesis:

Einstein put forth the daring hypothesis, that light has particulate properties (‘a kind of molecular structure in energy’). His heuristic principle stated that light is created and annihilated in discrete quanta in its interaction with matter. He suggested testing his proposal using the photoelectric effect. This was a revolutionary idea, because it was in absolute contradiction with Maxwell’s theory of the continuously varying electromagnetic field that describes pure radiation. His conviction in the verity of thermodynamics and in Boltzmann’s formula led the way. There is a possibility that his work on the discrete nature of matter influenced his work on the discrete nature of the electromagnetic field. Virendra Singh reviews the history of the light quantum.

###### The Legacy of Albert Einstein by Spenta R Wadia pdf free download

• Special relativity:

‘The electrodynamics of moving bodies’, is the paper on special relativity. In one fell swoop, Einstein replaced all mechanical explanations (and other attempts) of the constancy of the speed of light, irrespective of the motion of the source, by asserting a symmetry principle which all laws of nature must conform to! Thus was born special relativity and a new kinematic framework for physics. Maxwell’s equations are true but Newton’s mechanics had to be replaced. At the age of 16, while in Arrau, Einstein had asked, ‘If I pursue a beam of light with velocity c, I should observe such a beam of light as a spatially oscillatory electromagnetic field

at rest’.

## The Legacy of Albert Einstein by Spenta R Wadia pdf free download

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