What is the Greenhouse Effect (Easy Explanation) Video Lecture - Class 9

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now that we are talking about the carbon
cycle it becomes very important to talk
about this important effect for the
greenhouse effect
now however this greenhouse effect
related to carbon or carbon dioxide for
that matter so we will understand that
very gradually first let's try to see
what is this effect greenhouse it is not
a greenhouse where by looking at the
name you might think this is a house
which is green in color it is definitely
not a given house but it is an effect
that maintains the temperature which is
the earth so some time man I was telling
you the atmosphere axis or blanket and
therefore it helps the earth to maintain
its light temperature
so continuing from there I will tell you
that how exactly the temperature inside
the earth is maintained so of course
atmosphere plays a very important role
how because it helps to maintain a
balance between the incoming radiation
and the outgoing radiation from the
earth because the radiation coming from
the Sun to the earth so all the
radiation that is coming inside the
earth and the radiation which is going
out of the earth so a balance of tries
between both of these and that is where
greenhouse ethics comes into picture so
greenhouse effect is the name given to
the phenomenon in which the earth
surface is warmed up due to incoming
radiation through the atmosphere so
basically it is that phenomenon weather
temperature inside the earth is getting
increased so we eat the temperature
inside the earth warm enough now what
exactly happened we see here this is the
Sun and the truth of course so let us
draw here maybe that would be better
let's say this is the Sun and somewhere
here you have the earth so the Sun is
far away two electrons are small so this
would be the incoming radiation from the
Sun so this incoming radiation from the
source
religion is the Sun and about 70% of the
incoming solar radiation is absorbed by
the land ocean and atmosphere on the
earth now what happens when the solar
radiation is absorbed by all of these
they heat up right so the land absorbs
the solar radiation and it heats up the
water bodies absorb the solar radiation
they get heated up so when they eat up
they relieve eat in the form of infrared
radiation which passes out through the
atmosphere into space so if this would
be the infrared radiation which might
want to pass out through the atmosphere
back into the space so basically what is
entering is incoming radiation and
what's going out of the outgoing
radiation the incoming radiation is the
solar radiation outgoing radiation is
the infrared radiation which is emitted
by hot objects so all the objects inside
the earth be got became hot because of
the solar radiation and since they
became hot they gave out infrared
radiation so that should be the normal
scenario now what is happening is now
there are certain gases which we all as
the greenhouse gases so these greenhouse
gases are present somewhere here at that
mosaic and the greenhouse gases they
tend to absorb and re-emit the infrared
radiation that means the greenhouse
gases are some days here and deep
greenhouse gases do not allow all the
outgoing radiation to actually go out
they evolved quite a few of the infrared
radiation and the d emit them back
within the earth so what is happening
due to the presence of these greenhouse
gases so due to the presence of these
gases then net incoming is a lot more
than the net outgoing because here from
this kind of incoming radiation is
coming inside third and here also some
part of the outgoing infrared radiation
is coming back into the earth so the net
incoming is more than the net output
so therefore what will happen so more
radiation is coming inside the earth so
that means the temperature inside the
earth will grow so basically the Earth's
surface is warmed up so why this morning
happened this warming happened because
of the greenhouse gases and this effect
is known as greenhouse effect by which
the earth surface is warmed up now do
you think that warning of the earth
stretch is not a good thing no not
really that's because let's leave it
because that is the appropriate
temperature in which the living organism
can comfortably leave so that is why
purposefully we are trying to increase
the temperature of the earth surface so
that is green house again let us speak
so let us try to understand the concept
of greenhouse effect with the help of
this analogy so we will take the example
of a piggy bank so here this is you and
this is the piggy bank where you save
your money right so this is our first
scenario where we see that you have a
piggy bank like this where you just keep
depositing the money so whenever you
have some extra money you put it into
the piggy bank
so this piggy bank and such that you are
able to enter money inside it but you
are not able to take the money out
whenever you want because you see it
does not have any system from where you
can take out the money so you can take
out the money only at once when you
break the piggy bank right so this is
our fortune and there is a second
scenario where you do not have a piggy
bank
you just have a box like this where you
put your money so this kind you can put
your money whenever you want and you can
also take out the money wherever you
want so these are two different
scenarios now let us try to relate it to
what we have such changes now so let us
say that you are nothing but the Sun so
you represent Sun and the piggy bank
represents the earth so in the first
scenario what is happening the radiation
from the Sun which is nothing but the
money that is entering into the earth
but there is no need that the radiation
can come out so impact is what we happen
all the cool
we'll remain inside the earth - so much
of solar radiation inside the earth will
make it very very hot so in this is what
will happen the earth will become too
hot because too much of radiations too
much of incoming radiation and there is
no outgoing radiation so too much of
heat inside the earth the temperature
will increase too much now in this
scenario what will happen now solar
radiation will enter so there could be
incoming radiation but at the same time
there would be outgoing radiation also
doing this is if you are putting money
inside the box at the same rate almost
you are also taking out your money from
the box so as a result there is no money
in sizeable so in this case what is
going to happen in this case whatever
money
what is the solar radiation enters the
earth the same amount of radiation goes
out of the earth so as a result in this
case the temperature becomes quite cold
so if you look at the entire overall
temperature of the earth so the
temperature is quite cold industry now
let us look at an intermediate key so in
the intermediate case you have a piggy
bank but this time you have a lock and
key feature in the piggy bank that means
which key you can open the lock and that
now you can open the piggy bank only
when there is an urgent need so in this
case what happens you are able to save
your money but at the same time building
emergency you are able to take out some
money so this is what the scenario of
atmosphere is so the lock and key is
like the atmosphere so this time you
have a atmosphere which kind of
regulates the right temperature inside
the earth so there is some incoming
radiation but this I need is some
outgoing radiation but that doesn't mean
that all the incoming radiation is equal
to the outgoing radiation in this case
the outgoing radiation is lesser than
that of the incoming radiation so as a
result what will happen the temperature
inside the earth will keep it warm not
hot but warm now why is this happening
this is happening due to the presence of
atmosphere now to talk in words topmost
assignment what in that much pain is
causing this to happen the greenhouse
gases so the greenhouse gases in the
atmosphere causes the greenhouse effect
to the entire can organize a certain
gases and atmosphere they tend to
reabsorb and re emigrate solid education
because of that only needs PP to bring
out of it so we will now talk about what
are these greenhouse gases exactly thank
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