L3 : Cathode ray tube - Structure of Atom, Class 11, Chemistry Video Lecture

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this video please make sure that you
have watched part 1 and part 2 so as I
told right when you wrap this balloon
with the tile it gets charged so the
Scientific Committee thought from way
the child is coming later on which how
you got a positive child a negative
child so with this
thrust in mind to find the reason for
the charge this guy fairly developed
cathode ray tube kattiline tube is a
tube which is a vacuum it has one two
metals here one as cathode one is anode
and they connect to a high voltage and
they decrease the pressure here so if
you see 1850s only this guy Faraday he
begins study to study the electrical
discharge of the tubes and this tube is
called gone cathode ray discharge tubes
this is this look exactly like this and
this made of this is glass actually this
thing is glass and there are two metals
because electrons are all sealed in this
and the electrical discharge to the gas
can be observed only at low pressure and
high voltage so they pump out everything
and they apply high very high voltage
and that's why that's called cathode ray
tube where you have low pressure and
high voltage and then high voltage is
applied if you see when the applying the
high voltage current starts flowing in
current starts flowing in electron
starts flowing in from here like this
current starts flowing in but you can't
see it because you can't see electrons
right so I'll tell you what they had
done something to see the electrons so
if you see what they have done is they
have quoted this guy with the
fluorescent coating with this the
electron comes here it will hit this guy
the moment you hit this guy it will
blink it'll sparkle and then they can
feel that here is something collect Ron
right so that's what they have done and
the same thing is used in the television
set did you see the old television set
not the one which we have now
bein led but the old CRT cathode ray
tube based sets which we had that had
something like this cathode ray electron
GaN the electron used to come and this
used to hit this phosphorus sheet you
can say and it used to glow I end every
here and depending on where it glows it
gives different colors so and that's how
you see the television similar thing
here this is a very basic basic advanced
concept but the concept is all the same
where you have electron hitting the the
phosphorous and close so with this she
concluded that there is something an
electron why because when supplying
high-voltage something is flowing in
it's touching in something is getting
generated and what is that thing that
something is having a negative charge
for sure why because it is going from
here to here right if this is positive
and this guy's getting attracted what
person getting hit so that means that
something has negative charge for sure
you can see so this guy name that is
electron so we will see that in the next
slide so you see when these rays after
passing through an unknown this strike
this Jenks self-id coating a bright spot
is develop correct so if you see the
observation the observation was the
cathode rays which you see starts from
cathode to anode so if you see this guy
this was my cathode this is my ion right
so this guy started from the negative
sorry negative end there is a positive
end and this electron heat moving that
was one the Rays are not visible if you
see but when it strikes the fluorescent
metal we have seen which we have put it
here the phosphorous thing enclosed that
means the Ray is not visible but it it
you can feel that by making sure that
the that particular ray hits the
fluorescent material in the absence of
any electrical magnetic field they
travel in straight lines that's what he
is absorbed if he applied electrical
magnetic field
behaviors of cathode rays are similar to
the expected of negatively charged
particles what we have seen if you has
applied some electric field he has seen
that the electron TransAm / if he has
applied electric field like this right
and this this the electron was moving
here but he have seen that electrons are
moving in this direction so with the by
applying electric and magnetic field he
saw a change in behavior of the race and
that change in behavior of the waves was
just telling loud and clear that this
ray is negatively charged this is
negatively charged by applying negative
I mean my applying electrical and
magnetic field this guy was very very
sure that the thing which I am seeing
which which is hitting the fluorescent
thing him Simoni bell see is something
which is negative charge and he called
that guy as electro this is what we know
so will tell you how it comes also but
this is the place where he discovered
electron correct also he found that this
this characteristic of the cathode rays
that is electron now that does not
depend on the material the electron use
anything you use job and mu nian comma
doesn't matter right that means he told
that the electrons property the property
of electron of electron is independent
of which object you choose that is I'm
telling you you take a gold and from
gold you take out electron you take
silver from syllable you take out
electron both electrons will be same or
eating anything you take hydrogen from
their dedicated electron all the
electron will be seen irrespective of
which atom you took out that means
electrons electrons but in case of atoms
you see atoms are different the atoms of
all is if in momentum a silver is the
channel atom hydrogen but we talk about
subatomic particle electron electron is
same the characteristic tone is same it
doesn't matter you took out electrons of
gold silver iron aluminum doesn't matter
it is same right the characteristic of
electron is
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