mayankdevnani
  • mayankdevnani
My first TUTORIAL on BLACK HOLE-
Biology
katieb
  • katieb
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mayankdevnani
  • mayankdevnani
\[\Huge{\bf{\color{blue}{Whatis }\color{red}{Blackhole--}}}\] \[\Large{\bf{\color{black}{What is }\color{red}{Blackhole==}}}\] A black hole is defined by the escape velocity that would have to be attained to escape from the gravitational pull exerted upon an object. For example, the escape velocity of earth is equal to 11 km/s. Anything that wants to escape earth's gravitational pull must go at least 11 km/s, no matter what the thing is — a rocket ship or a baseball. The escape velocity of an object depends on how compact it is; that is, the ratio of its mass to radius. A black hole is an object so compact that, within a certain distance of it, even the speed of light is not fast enough to escape. A black hole itself is invisible because no light can escape from it. In fact, when black holes were first hypothesized they were called "invisible stars." If black holes are invisible, how do we know they exist? This is exactly why it is so difficult to find a black hole in space! However, a black hole can be found indirectly by observing its effect on the stars and gas close to it. For example, consider a double-star system in which the stars are very close. If one of the stars explodes as a supernova and creates a black hole, gas and dust from the companion star might be pulled toward the black hole if the companion wanders too close. In that case, the gas and dust are pulled toward the black hole and begin to orbit around the event horizon and then orbit the black hole. The gas becomes heavily compressed and the friction that develops among the atoms converts the kinetic energy of the gas and dust into heat, and x-rays are emitted. Using the radiation coming from the orbiting material, scientists can measure its heat and speed. From the motion and heat of the circulating matter, we can infer the presence of a black hole. The hot matter swirling near the event horizon of a black hole is called an accretion disk. \[\Large{\bf{\color{pink}{What does a}\color{green}{black hole look like?}}}\] John Wheeler, a prominent theorist, compared observing these double-star systems to watching women in white dresses dancing with men in black tuxedos within a dimly lit ballroom. You see only the women, but you could predict the existence of their invisible partners because of the women's' spinning and whirling motions around a central axis. Searching for stars whose motions are influenced by invisible partners is one way in which astronomers search for possible black holes.
mayankdevnani
  • mayankdevnani
@ajprincess @JOYAL @jiteshmeghwal9 @thivitaa @rahul_rajawat have a look:)
mayankdevnani
  • mayankdevnani
@ganeshie8 @hba @moongazer @Musicdude123 @Miyuru plz

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mayankdevnani
  • mayankdevnani
@scarydoor @shahzadjalbani @Shadowys @SheldonEinstein have a look:)
anonymous
  • anonymous
thanks the information is realy nice dear... :)
mayankdevnani
  • mayankdevnani
welcome
jiteshmeghwal9
  • jiteshmeghwal9
``` \[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]
jiteshmeghwal9
  • jiteshmeghwal9
It ill give u gap
mayankdevnani
  • mayankdevnani
\[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]
jiteshmeghwal9
  • jiteshmeghwal9
Well, really good concept about black hole :)
mayankdevnani
  • mayankdevnani
hey!!! don't works @jiteshmeghwal9
anonymous
  • anonymous
Wow Great tutorial. I didn't knew these facts... Thanks very much for sharing.. And for the space you don't actually need to type space.. :)
mayankdevnani
  • mayankdevnani
ok thnx... @Miyuru
anonymous
  • anonymous
No problem..
jiteshmeghwal9
  • jiteshmeghwal9
& when the astraunauts go to space they first look at the space which is very dark & they try to escape. Black holes are made when star become much older & then there is a very great blast namely nova or supernova & then it turns to black hole. Nice stuff @mayankdevnani :)
jiteshmeghwal9
  • jiteshmeghwal9
\[\Huge{\color{red}{\text{What is Black Hole ?}}}\]
jiteshmeghwal9
  • jiteshmeghwal9
It's working in my computer :)
anonymous
  • anonymous
Great indeed @mayankdevnani
jiteshmeghwal9
  • jiteshmeghwal9
Ok ! now write it without putting space in LaTeX
mayankdevnani
  • mayankdevnani
ok
anonymous
  • anonymous
Well is the escape velocity greater than the speed of light ? ;)
jiteshmeghwal9
  • jiteshmeghwal9
\[\Huge{\color{gold}{\star \star \star}{\color{red}{\mathbb{G}\color{blue}{\mathbb{r}\color{green}{\mathbb{e}}\color{magenta}{a}\color{purple}{t}\color{violet}{!!!}}}}}\]
mayankdevnani
  • mayankdevnani
That is the very definition of a black hole: an object so massive and dense its escape velocity is greater than the speed of light. So yes. If the escape velocity was slightly less than the speed of light the object would be a neutron star. ok @Miyuru
hba
  • hba
\Huge{\color{red}{\text{What is Black Hole ?}}}
anonymous
  • anonymous
Ohh NICE Got it Thanks again... And nice letters @jiteshmeghwal9
jiteshmeghwal9
  • jiteshmeghwal9
Thanxx !!! XD
hba
  • hba
@jiteshmeghwal9 Can you teach me latex ?
jiteshmeghwal9
  • jiteshmeghwal9
yeah ! why not
hba
  • hba
@jiteshmeghwal9 So Lets start with it in a new tab i want it from the basics
jiteshmeghwal9
  • jiteshmeghwal9
but in LaTeX group :)
jiteshmeghwal9
  • jiteshmeghwal9
ok !
anonymous
  • anonymous
\[\color{green}{\text{I'll give you a nice idea what about posting a tutorial about LaTex..}}\] @jiteshmeghwal9
mayankdevnani
  • mayankdevnani
@Kira_Yamato @nubeer
mayankdevnani
  • mayankdevnani
@Shadowys @shahzadjalbani @scarydoor @SheldonEinstein
Kira_Yamato
  • Kira_Yamato
すごいい
ajprincess
  • ajprincess
\[\Large\frak\color{silver}{Great~Tutorial}\] @mayankdevnani
mayankdevnani
  • mayankdevnani
thnx... @ajprincess
mayankdevnani
  • mayankdevnani
what? @Kira_Yamato
anonymous
  • anonymous
Great letters @ajprincess
mayankdevnani
  • mayankdevnani
@idkm @InYourHead
Kira_Yamato
  • Kira_Yamato
すごいい = Great, Impressive, Awesome
mayankdevnani
  • mayankdevnani
i don' think @moongazer would like my tutorial!!!
mayankdevnani
  • mayankdevnani
thnx... any medals @Kira_Yamato
ajprincess
  • ajprincess
welcome:) @mayankdevnani nd thanx:) @miyuru
mayankdevnani
  • mayankdevnani
@RahulZ @Calculator @FlyingBubbles
nubeer
  • nubeer
it's a nice tutorial. Good Work. :)
mayankdevnani
  • mayankdevnani
thnx... @nubeer
jiteshmeghwal9
  • jiteshmeghwal9
@Miyuru most better LaTeX tutorial has been given by @AccessDenied :)
mayankdevnani
  • mayankdevnani
@angela210793 @AccessDenied
anonymous
  • anonymous
Ohh really @jiteshmeghwal9 thnx for telling me tht .. How can i find his tutorial...:)
jiteshmeghwal9
  • jiteshmeghwal9
wait...
mayankdevnani
  • mayankdevnani
@sirm3d
mayankdevnani
  • mayankdevnani
@Hero @karatechopper @Jonask @EarthCitizen @uri
jiteshmeghwal9
  • jiteshmeghwal9
In this tutorial my bro @TheViper has a gr8 role :)
jiteshmeghwal9
  • jiteshmeghwal9
@Miyuru :)
anonymous
  • anonymous
Ohh thnx a lot @jiteshmeghwal9 for the links I'll see them ....:)
jiteshmeghwal9
  • jiteshmeghwal9
yw :)
anonymous
  • anonymous
I'm guessing this is the Newtonian description of a black hole. :) Nice work.
mayankdevnani
  • mayankdevnani
thnx...
mayankdevnani
  • mayankdevnani
any medal @Shadowys
mayankdevnani
  • mayankdevnani
@mukushla
mayankdevnani
  • mayankdevnani
@TheViper
mayankdevnani
  • mayankdevnani
@ganeshie8
TheViper
  • TheViper
\[Nice \quad Tutorial\]
mayankdevnani
  • mayankdevnani
thnx....
mayankdevnani
  • mayankdevnani
@nincompoop
mayankdevnani
  • mayankdevnani
@Omniscience
mayankdevnani
  • mayankdevnani
hey!!! @nincompoop it's just a basic
mayankdevnani
  • mayankdevnani
what??
anonymous
  • anonymous
As a side note, the black hole must be thought in terms of General Relativity instead of Newtonian Mechanics to avoid discrepancies between "gravity". For example escape velocity of a black hole is infinite and is not subject to the radius of the black hole in GR instead but not NM. IOW, NM just don't cut it.
mayankdevnani
  • mayankdevnani
it's just a structure not a deeply study ok @nincompoop but you are said it was very imp. part of black hole.....thanks for your advice
mayankdevnani
  • mayankdevnani
very-2 thank you @Shadowys
mayankdevnani
  • mayankdevnani
yaa
mayankdevnani
  • mayankdevnani
@Faris_Waleed
anonymous
  • anonymous
You're welcome! :) Just helping you helping others lol
mayankdevnani
  • mayankdevnani
:)

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