Question

My first TUTORIAL on BLACK HOLE-

Answer 1

\[\Huge{\bf{\color{blue}{Whatis }\color{red}{Blackhole--}}}\]


\[\Large{\bf{\color{black}{What is }\color{red}{Blackhole==}}}\]

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.

Answer 2

@ajprincess @JOYAL @jiteshmeghwal9 @thivitaa @rahul_rajawat have a look:)

Answer 3

@ganeshie8 @hba @moongazer @Musicdude123 @Miyuru plz

Answer 4

@scarydoor @shahzadjalbani @Shadowys @SheldonEinstein have a look:)

Answer 5

thanks
the information is realy nice dear... :)

Answer 6

welcome

Answer 7

```
\[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]

Answer 8

It ill give u gap

Answer 9

\[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]

Answer 10

Well, really good concept about black hole :)

Answer 11

hey!!! don't works @jiteshmeghwal9

Answer 12

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.. :)

Answer 13

ok thnx... @Miyuru

Answer 14

No problem..

Answer 15

& 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 :)

Answer 16

\[\Huge{\color{red}{\text{What is Black Hole ?}}}\]

Answer 17

It's working in my computer :)

Answer 18

Great indeed @mayankdevnani

Answer 19

Ok ! now write it without putting space in LaTeX

Answer 20

ok

Answer 21

Well is the escape velocity greater than the speed of light ? ;)

Answer 22

\[\Huge{\color{gold}{\star \star \star}{\color{red}{\mathbb{G}\color{blue}{\mathbb{r}\color{green}{\mathbb{e}}\color{magenta}{a}\color{purple}{t}\color{violet}{!!!}}}}}\]

Answer 23

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

Answer 24

\Huge{\color{red}{\text{What is Black Hole ?}}}

Answer 25

Ohh NICE Got it
Thanks again...
And nice letters @jiteshmeghwal9

Answer 26

Thanxx !!!
XD

Answer 27

@jiteshmeghwal9 Can you teach me latex ?

Answer 28

yeah ! why not

Answer 29

@jiteshmeghwal9 So Lets start with it in a new tab i want it from the basics

Answer 30

but in LaTeX group :)

Answer 31

ok !

Answer 32

\[\color{green}{\text{I'll give you a nice idea what about posting a tutorial about LaTex..}}\] @jiteshmeghwal9

Answer 33

@Kira_Yamato @nubeer

Answer 34

@Shadowys @shahzadjalbani @scarydoor @SheldonEinstein

Answer 35

すごいい

Answer 36

\[\Large\frak\color{silver}{Great~Tutorial}\]
@mayankdevnani

Answer 37

thnx... @ajprincess

Answer 38

what? @Kira_Yamato

Answer 39

Great letters @ajprincess

Answer 40

@idkm @InYourHead

Answer 41

すごいい = Great, Impressive, Awesome

Answer 42

i don' think @moongazer would like my tutorial!!!

Answer 43

thnx... any medals @Kira_Yamato

Answer 44

welcome:) @mayankdevnani nd thanx:) @miyuru

Answer 45

@RahulZ @Calculator @FlyingBubbles

Answer 46

it's a nice tutorial.
Good Work. :)

Answer 47

thnx... @nubeer

Answer 48

@Miyuru most better LaTeX tutorial has been given by @AccessDenied :)

Answer 49

@angela210793 @AccessDenied

Answer 50

Ohh really @jiteshmeghwal9 thnx for telling me tht .. How can i find his tutorial...:)

Answer 51

wait...

Answer 52

@sirm3d

Answer 53

@Hero @karatechopper @Jonask @EarthCitizen @uri

Answer 54

http://openstudy.com/users/accessdenied#/updates/4fa5b375e4b029e9dc35a2cf

Answer 55

In this tutorial my bro @TheViper has a gr8 role :)

Answer 56

@Miyuru :)

Answer 57

Ohh thnx a lot @jiteshmeghwal9 for the links I'll see them ....:)

Answer 58

yw :)

Answer 59

I'm guessing this is the Newtonian description of a black hole. :) Nice work.

Answer 60

thnx...

Answer 61

any medal @Shadowys

Answer 62

@mukushla

Answer 63

@TheViper

Answer 64

@ganeshie8

Answer 65

\[Nice \quad Tutorial\]

Answer 66

thnx....

Answer 67

@nincompoop

Answer 68

@Omniscience

Answer 69

hey!!! @nincompoop it's just a basic

Answer 70

what??

Answer 71

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.

Answer 72

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

Answer 73

very-2 thank you @Shadowys

Answer 74

yaa

Answer 75

@Faris_Waleed

Answer 76

You're welcome! :) Just helping you helping others lol

Answer 77

:)