The Journey of Physics with Interesting facts.
                     THE JOURNEY OF PHYSICS 
WITH INTERESTING FACTS
 
INTRODUCTION
 From the beginning, physics was driven by 
the spirit of mechanism. 
 Then the idea emerged that there were 
particles like electrons on one hand, and 
fields like gravitational and electromagnetic 
fields on the other. 
 With the birth of quantum mechanics, physics 
turned toward a more unified worldview.
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Newton’s Physics
 Newton tried to solve Bentley’s paradox, 
which stated that all stars and celestial 
bodies should implode into a point due to the 
attracting nature of gravity. 
 Though the Earth cannot be concluded to be 
exactly at the center of the universe, due to 
the expanding nature of the universe, it 
appears that the universe is approximately 
isotropic.
 The world was satisfied by the Newtonian 
explanation of the universe.
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Heisenberg’s uncertainty 
principle
 Heisenberg’s uncertainty principle has proved 
that it is impossible to determine, with a 
hundred percent certainty, both the position 
and momenta of even a single particle, leave 
alone all the particles of the universe. 
 Also, both the errors in energy and time 
cannot be simultaneously known for a 
particle.
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Einstein Physics
 Einstein tried to challenge the uncertainty 
principle. He imagined a box of light. 
 Theoretically, a single photon could be 
released from the box by a clockwork 
shutter. Thus, the exact time could be 
recorded. 
 Finding the change in mass, using E=MC2 
the energy of the photon could also be 
known.
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The Advent of Quantum 
Mechanics
 Quantum mechanics is used everywhere, 
accepted widely, and verified theoretically. 
Yet, it challenges the basic notions of the 
nature of reality. 
 Quantum mechanics even leaves open the 
exciting possibility of human teleportation, 
that is, instantaneously transporting 
humans over astronomical distances. 
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Einstein, Relativity and 
Cosmology
 Einstein proposed to treat time as the 
fourth dimension, which, along with the 
three space dimensions, formed a 
spacetime continuum. 
 He predicted that no body, with no matter 
how small a rest mass, could ever reach or 
exceed the speed of light.
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Modern Physics
 Modern physics is a branch of physics 
which deals with the post-Newtonian 
concepts in the world of physics. 
 It is based on the two major breakthroughs 
of the twentieth century: Relativity and 
Quantum Mechanics.
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Interesting Fact-1
 Though nothing can exceed light speed, 
space itself can. 
 A good analogy is the fact that when a 
balloon with a lot of spots on it is inflated, 
though the spots do not move by 
themselves, the distance between them 
keeps increasing.
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Interesting Fact-2
 Because of differences in gravity, a 200 
pound person would only weigh 76 pounds 
on Mars. 
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Interesting Fact-3
 When traveling at 80 kilometers per hour 
(50 miles per hour), cars use around half of 
their fuel just to overcome wind resistance.
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