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mayankdevnani Group Title

My first TUTORIAL on BLACK HOLE-

  • one year ago
  • one year ago

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  1. mayankdevnani Group Title
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    \[\Huge{\bf{\color{blue}{Whatis }\color{red}{Blackhole--}}}\] \[\Large{\bf{\color{black}{What is }\color{red}{Blackhole==}}}\] 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.

    • one year ago
  2. mayankdevnani Group Title
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    @ajprincess @JOYAL @jiteshmeghwal9 @thivitaa @rahul_rajawat have a look:)

    • one year ago
  3. mayankdevnani Group Title
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    @ganeshie8 @hba @moongazer @Musicdude123 @Miyuru plz

    • one year ago
  4. mayankdevnani Group Title
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    @scarydoor @shahzadjalbani @Shadowys @SheldonEinstein have a look:)

    • one year ago
  5. rahul_rajawat Group Title
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    thanks the information is realy nice dear... :)

    • one year ago
  6. mayankdevnani Group Title
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    welcome

    • one year ago
  7. jiteshmeghwal9 Group Title
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    ``` \[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]

    • one year ago
  8. jiteshmeghwal9 Group Title
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    It ill give u gap

    • one year ago
  9. mayankdevnani Group Title
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    \[\Huge{\color{red}{\text{What \space is \space Black \space hole ?? }}}\]

    • one year ago
  10. jiteshmeghwal9 Group Title
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    Well, really good concept about black hole :)

    • one year ago
  11. mayankdevnani Group Title
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    hey!!! don't works @jiteshmeghwal9

    • one year ago
  12. Miyuru Group Title
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    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.. :)

    • one year ago
  13. mayankdevnani Group Title
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    ok thnx... @Miyuru

    • one year ago
  14. Miyuru Group Title
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    No problem..

    • one year ago
  15. jiteshmeghwal9 Group Title
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    & 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 :)

    • one year ago
  16. jiteshmeghwal9 Group Title
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    \[\Huge{\color{red}{\text{What is Black Hole ?}}}\]

    • one year ago
  17. jiteshmeghwal9 Group Title
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    It's working in my computer :)

    • one year ago
  18. Miyuru Group Title
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    Great indeed @mayankdevnani

    • one year ago
  19. jiteshmeghwal9 Group Title
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    Ok ! now write it without putting space in LaTeX

    • one year ago
  20. mayankdevnani Group Title
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    ok

    • one year ago
  21. Miyuru Group Title
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    Well is the escape velocity greater than the speed of light ? ;)

    • one year ago
  22. jiteshmeghwal9 Group Title
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    \[\Huge{\color{gold}{\star \star \star}{\color{red}{\mathbb{G}\color{blue}{\mathbb{r}\color{green}{\mathbb{e}}\color{magenta}{a}\color{purple}{t}\color{violet}{!!!}}}}}\]

    • one year ago
  23. mayankdevnani Group Title
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    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

    • one year ago
  24. hba Group Title
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    \Huge{\color{red}{\text{What is Black Hole ?}}}

    • one year ago
  25. Miyuru Group Title
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    Ohh NICE Got it Thanks again... And nice letters @jiteshmeghwal9

    • one year ago
  26. jiteshmeghwal9 Group Title
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    Thanxx !!! XD

    • one year ago
  27. hba Group Title
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    @jiteshmeghwal9 Can you teach me latex ?

    • one year ago
  28. jiteshmeghwal9 Group Title
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    yeah ! why not

    • one year ago
  29. hba Group Title
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    @jiteshmeghwal9 So Lets start with it in a new tab i want it from the basics

    • one year ago
  30. jiteshmeghwal9 Group Title
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    but in LaTeX group :)

    • one year ago
  31. jiteshmeghwal9 Group Title
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    ok !

    • one year ago
  32. Miyuru Group Title
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    \[\color{green}{\text{I'll give you a nice idea what about posting a tutorial about LaTex..}}\] @jiteshmeghwal9

    • one year ago
  33. mayankdevnani Group Title
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    @Kira_Yamato @nubeer

    • one year ago
  34. mayankdevnani Group Title
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    @Shadowys @shahzadjalbani @scarydoor @SheldonEinstein

    • one year ago
  35. Kira_Yamato Group Title
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    すごいい

    • one year ago
  36. ajprincess Group Title
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    \[\Large\frak\color{silver}{Great~Tutorial}\] @mayankdevnani

    • one year ago
  37. mayankdevnani Group Title
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    thnx... @ajprincess

    • one year ago
  38. mayankdevnani Group Title
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    what? @Kira_Yamato

    • one year ago
  39. Miyuru Group Title
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    Great letters @ajprincess

    • one year ago
  40. mayankdevnani Group Title
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    @idkm @InYourHead

    • one year ago
  41. Kira_Yamato Group Title
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    すごいい = Great, Impressive, Awesome

    • one year ago
  42. mayankdevnani Group Title
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    i don' think @moongazer would like my tutorial!!!

    • one year ago
  43. mayankdevnani Group Title
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    thnx... any medals @Kira_Yamato

    • one year ago
  44. ajprincess Group Title
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    welcome:) @mayankdevnani nd thanx:) @miyuru

    • one year ago
  45. mayankdevnani Group Title
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    @RahulZ @Calculator @FlyingBubbles

    • one year ago
  46. nubeer Group Title
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    it's a nice tutorial. Good Work. :)

    • one year ago
  47. mayankdevnani Group Title
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    thnx... @nubeer

    • one year ago
  48. jiteshmeghwal9 Group Title
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    @Miyuru most better LaTeX tutorial has been given by @AccessDenied :)

    • one year ago
  49. mayankdevnani Group Title
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    @angela210793 @AccessDenied

    • one year ago
  50. Miyuru Group Title
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    Ohh really @jiteshmeghwal9 thnx for telling me tht .. How can i find his tutorial...:)

    • one year ago
  51. jiteshmeghwal9 Group Title
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    wait...

    • one year ago
  52. mayankdevnani Group Title
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    @sirm3d

    • one year ago
  53. mayankdevnani Group Title
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    @Hero @karatechopper @Jonask @EarthCitizen @uri

    • one year ago
  54. jiteshmeghwal9 Group Title
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    http://openstudy.com/users/accessdenied#/updates/4fa5b375e4b029e9dc35a2cf

    • one year ago
  55. jiteshmeghwal9 Group Title
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    In this tutorial my bro @TheViper has a gr8 role :)

    • one year ago
  56. jiteshmeghwal9 Group Title
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    @Miyuru :)

    • one year ago
  57. Miyuru Group Title
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    Ohh thnx a lot @jiteshmeghwal9 for the links I'll see them ....:)

    • one year ago
  58. jiteshmeghwal9 Group Title
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    yw :)

    • one year ago
  59. Shadowys Group Title
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    I'm guessing this is the Newtonian description of a black hole. :) Nice work.

    • one year ago
  60. mayankdevnani Group Title
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    thnx...

    • one year ago
  61. mayankdevnani Group Title
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    any medal @Shadowys

    • one year ago
  62. mayankdevnani Group Title
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    @mukushla

    • one year ago
  63. mayankdevnani Group Title
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    @TheViper

    • one year ago
  64. mayankdevnani Group Title
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    @ganeshie8

    • one year ago
  65. TheViper Group Title
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    \[Nice \quad Tutorial\]

    • one year ago
  66. mayankdevnani Group Title
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    thnx....

    • one year ago
  67. mayankdevnani Group Title
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    @nincompoop

    • one year ago
  68. mayankdevnani Group Title
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    @Omniscience

    • one year ago
  69. mayankdevnani Group Title
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    hey!!! @nincompoop it's just a basic

    • one year ago
  70. mayankdevnani Group Title
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    what??

    • one year ago
  71. Shadowys Group Title
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    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.

    • one year ago
  72. mayankdevnani Group Title
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    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

    • one year ago
  73. mayankdevnani Group Title
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    very-2 thank you @Shadowys

    • one year ago
  74. mayankdevnani Group Title
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    yaa

    • one year ago
  75. mayankdevnani Group Title
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    @Faris_Waleed

    • one year ago
  76. Shadowys Group Title
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    You're welcome! :) Just helping you helping others lol

    • one year ago
  77. mayankdevnani Group Title
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    :)

    • one year ago
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