Hello ladies and gentleman, its your teacher
here and without further introduction, we
will start with our first lecture about what
is physics, topics to be covered in this lecture
are:
Definition
History
Branches
So, we will start with definition like what
is physics?
Most people hear the word 'physics' and run
for cover.
But it's not just for rocket scientists!
You are surrounded by physics all the time,
and whether you realize it or not, you use
physics every day.
The word 'physics' comes from the Greek 'knowledge
of nature.
One thing that may come to mind when you think
of physics is the many scientific laws, which
are statements describing phenomena that have
been repeatedly tested and confirmed.
This is actually an important part of physics.
These laws (such as gravity and Newton's laws
of motion) are so thoroughly tested that they
are accepted as 'truths,' and they can be
used to help us predict how other things will
behave.
Because physics explains natural phenomena
in the universe and because, It provides a
basis for all other sciences - without physics,
you couldn't have biology, chemistry, or anything
else!
Physics has been around for a long, long time.
We consider the Ancient Greeks to be the 'founders'
of early physics, as they pushed for a better
understanding of the natural world around
them.
This includes some major players you are likely
familiar with, like Socrates,,,,,, Plato,,,,,,,,
and Aristotle.
Modern physics came centuries later, with
folks like Copernicus,,,,,,,, Galileo,,,,,,,,,,
and Newton during the 15- and 1600s.
There were many critical scientific breakthroughs
during this time as people discovered more
and more about our universe.
In fact, much of the knowledge we take for
granted was discovered during this Scientific
Revolution.
Galileo described many fundamental physical
concepts.
Physics certainly wouldn't be the same without
Isaac Newton, who you will no doubt learn
much about in your physics studies.
Newton is also credited with inventing calculus,
though you may or may not agree with that
being a good thing!
Physics is a broad and complex field.
It covers everything from sound,,,,,, and
light,,,,,,,, to nuclear science,,,,,,,, and
geology.
Because of this, it's been divided into different
branches so that scientists can specialize
in their knowledge of physics.
Mechanics is one major branch of physics.
Classical mechanics and quantum mechanics
are two sub-fields of this branch.
Another is thermodynamics, which is just what
it sounds like, Though this is but a branch
of physics, it is a broad and complex field
all in itself, studied by many different types
of scientists and engineers.
Because physics includes the study of light
and sound, you can bet there are branches
dealing with each of these.
Both of these fields help describe how we
interact with the world around us through
two of our most important senses.
Without electromagnetism field of study we
wouldn't have electricity to power our homes,
so I'm a big fan of this one!..
Fluid dynamics is a unique field of physics,,Fluids
can be liquids or gases, and this is an exciting
field if you like studying things that flow.
Ever heard of a guy named Albert Einstein?
He's pretty famous in the world of physics,
partly because of his Theory of Relativity,
from which a branch of physics was developed.
Simply called relativity.
Of course, this is just a short list, and
there are many interdisciplinary branches
of physics as well.
Fields like biophysics, physical chemistry,
geophysics, and astrophysics exist as well,
and these help bridge gaps between other natural
sciences and the fundamentals of physics.
So, what have we learned in this lecture is
that Without physics you would have a difficult
time living, breathing, or doing just about
anything, Physics is the study of matter and
energy, but that simple description doesn't
really do it justice.
Physics encompasses a wealth of topics - fluids,
heat, light, sound, forces, electricity, and
magnetism, just to name a few.
Physics is considered the most fundamental
science because it provides a basis for all
other sciences.
Just try to do biology or chemistry without
physics and you'll find you come up short.
Physics has a long and rich history.
Humans have been trying to explain natural
phenomena for as long as they have been on
Earth, but modern physics is considered to
have come about through the Scientific Revolution
of the 16th and 17th centuries.
Thanks to the hard work of scientific pioneers
like Galileo, Newton, Copernicus, and others,
we now have a vast and scientifically supported
body of knowledge about our natural world.
So, students that’s it.
Hope you learned and enjoyed it together.
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