Physics Physical World Part 2 (Scope & Excitement of Physics) Class X1

hello friends this video on physical
world part 2 is brought to you by exam
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make sure that you have gone through
physical world part 1 before you go
ahead with this part it the next we'll
talk about is scope of physics well
friends what do you think what is the
scope of physics or how broad is physics
to study well broadly there are three
domains of interest in physics they are
the macroscopic domain the Muzo scopic
domain and the microscopic domain now
we'll discuss each of these domain one
by one so let us look at the macroscopic
domain so what do you think the
macroscopic domain would be as the name
suggests macro what does the word macro
means macro means big something which is
big in size skopic something whose scope
is big that is macroscopic very simple
right so the macroscopic domain includes
phenomenon ad the terrestrial and
astronomical scales when I say terraced
real and astronomical in terrestrial I
talk about things which see which we see
around us for example human beings
animals trees buildings and anything
almost everything that is visible to us
which we can see with our naked eye
around us they are all they all fall
under the territorial scale similarly
when I talk of astronomical scales I
talk of all the celestial bodies for
example the planets stars etc in the
macroscopic domain if you see we are
dealing with things which are very big
in size correct so next let us see the
microscopic domain very similar to
macroscopic that
Micro means something which is very
small in size so this microscopic domain
includes molecular atomic and nuclear
phenomena so do you think you can see a
molecule with your naked eye of course
not so anything which we see around us
is at the end made up of molecules which
in turn is again made up of atoms and
atoms and turn consists of the nucleus
so just imagine how small things this
microscopic domain deals with so now let
us see the third one that is the meiosis
copy means oh the name suggests it is
something in between macro and micro
something in between these two so
something in middle of micro and macro
that means something which is neither
too big nor too small so the mesoscopic
domain deals with a few hundreds or tens
of atoms that means it deals with
several groups of atoms well these days
this mesoscopics domain is emerging as
an exciting field of research you can
see many people doing a lot of research
on this domain now so we learnt about
the three domains what are the three
domains we learned macro micro and Musil
now let us have a quick comparison so
that you can just relate it very quickly
what I told was anything which we see
around us that is macroscopic domain now
friends anything which we see around us
is made up of matter correct this matter
in turn is made up of molecules
molecules in turn is made up of atoms
and atoms in turn consists of nucleus so
anything which we see around us they are
all matter
so this is the macroscopic domain now
the molecules atoms nucleus they all
fall under the microscopic domain and
something in between these two that
means somewhere here that is nothing but
that means Oh score big domain so I hope
it is very clear to you now macro
magnin's oh and then Micro okay so now
let's see what makes physics an exciting
subject I mean why do a person want to
study physics for use together but the
first thing is carrying out interesting
experiments in lab that is absolutely
interesting you are going to learn
something new every day and that too but
whatever you yourself are doing so
that's absolutely interesting the next
is discovering secrets of nature as I
told you the rainbow which is formed is
big since childhood we are seeing a
rainbow on the sky but we don't know
what makes a rainbow but later in life
when you study and you come to know okay
this is the reason which makes the
rainbow formed it is very joyful so to
discover secrets of nature to know about
things which you already knew since
childhood that also turns out to be very
interesting
third applying laws of physics for
practical purposes for example there are
several concepts in physics like I'll
give you a small example like we study a
phenomenon called electromagnetic
induction again you don't worry we'll
discuss it in the concern chapter just
to give this example I am quoting this
name we have a phenomenon called
electromagnetic induction
now what using this principle we
generate the devices which we see around
us like
electric motors electric generators they
are all based on these principles of
electromagnetic induction so if we see
near there's several laws and physics
which are finally used for practical
purposes in some of the other way the
next we'll discusses physics technology
and society how are they interrelated
you know at certain times what happens
is technology comes first and then it
gives rise to a new physics when I say
new physics I mean to say it gives rise
to click if we talk of visits we have
several branches of study even inside
physics sometimes it happens that a
technology comes and then it leaves rise
to a completely new branch of physics
I'll quote you an example here for
example the heat engine this heat engine
was discovered somewhere around 1700
approximately now after this heat engine
was discovered the scientists studied
the principles and the reasons which
make the heat engine work and finally
they discovered a complete discipline of
thermodynamics which is a very important
and a very significant part of physics
these days so if you see that it was
because of the heat engine that
thermodynamics came into picture
similarly at some other times physics
comes first and then it gives rise to
new technology for example the silicon
chip or the integrated circuit how did
it come it came it was basically nothing
but combination of resistors transistors
and other components these resistors and
transistors are nothing but they are
direct product of physics and from these
chips and I sees the entire computer
revolution took place so the computer
revolution which we see these days is
nothing but technology
but this technology came from core
physics that is from the semiconductor
physics so the theory of semiconductor
physics gave rise to the computer
revolution so we can say that physics
and technology both of them can give
rise to each other sometimes physics
comes first and gives rise to technology
at other times technology comes first
and gives rise to physics thank you
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