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DLS

  • 2 years ago

Example of any 2 particles which do not exert Gravitational force on each other?

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  1. DLS
    • 2 years ago
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    @experimentX @Mashy

  2. Mashy
    • 2 years ago
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    photons? :P

  3. DLS
    • 2 years ago
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    I thought of photon but its not exactly massless..it has SOME mass so negligible..but no 0

  4. DLS
    • 2 years ago
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    timing:D

  5. Mashy
    • 2 years ago
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    ermm.. is it?.. i thought it had no mass :D

  6. DLS
    • 2 years ago
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    \[\LARGE M_{p}=1.8 \times 10^{-42}g\]

  7. Mashy
    • 2 years ago
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    omg.. :O.. where did you get that from? :O.. anwyays.. there are no particles then without gravity as far as i know :O

  8. DLS
    • 2 years ago
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    if photons dont have mass how do they have momentum?

  9. Mashy
    • 2 years ago
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    that is really more subtle than you think.. when light can act like both particle and wave... which itself is mind boggling.. you think it not having mass but having momentum is a big deal? :P

  10. DLS
    • 2 years ago
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    lol

  11. Iamgmg90
    • 2 years ago
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    You measure gravitational force on particles that's at a quantum level, which involves photons. In QM photons are considered to have a rest mass of 0, so I guess the only answer is photon. Higgs to come?

  12. DLS
    • 2 years ago
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    Higgs is massless?

  13. Iamgmg90
    • 2 years ago
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    DLS look into photoelectric effect derivation and compton scattering

  14. Mashy
    • 2 years ago
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    but you know what?? think of this .. if two photons of light are moving parallel to each other(in vacuum)... if they put force of gravity on each other, then their velocities WOULD CHANGE right.. i don't care how small that change is.. but it would change.. ?? but remember relativity?? light cannot have ANY OTHER speed than C.. in vacuum.. regardless of what crap you do!!.. so they cannot put gravitational force on each other :O hmm.. how is that argument? :O

  15. Iamgmg90
    • 2 years ago
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    for why it has momentum, no higgs would give more knowledge, it gives mass.

  16. DLS
    • 2 years ago
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    i know photoelectric effect

  17. Mashy
    • 2 years ago
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    or maybe not.. you can use general relativity to explain that.. so never mind :D

  18. DLS
    • 2 years ago
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    The Standard Model's explanation of why some fundamental particles have mass when 'naive' theory says Higgs boson should be massless

  19. DLS
    • 2 years ago
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    so can we say photon photon and boson boson :O

  20. DLS
    • 2 years ago
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    @Mashy dude stop showing off relativity in every question of mine when u know i dont understand it :P

  21. Iamgmg90
    • 2 years ago
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    Photoelectric determines relationship between energy and frequency ... E proportional to (a + bw) where w = angular omentum so E = Hbar(w-w_a) = h(v - v_a) photon rest mass is zero for general relation of energy, so it can be written as E^2 = (m_0*c^2)^2 + p^2c^2 = Hbar^2w^2 and can cancel to momentum p = Hbar * k, where k = w/c (wave number) therefore the momentum of a photo can be given as p = Hbar * k bear in mind wave particle duality, how a wave can have momentum is a toughy, yet quite beautiful

  22. Mashy
    • 2 years ago
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    wait for @Iamgmg90 something bombastic is on its way.. either that or his computer is stuck :D

  23. Mashy
    • 2 years ago
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    ok sorry DLS :P.. didn't mean to!

  24. Iamgmg90
    • 2 years ago
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    Bombastic haha, its just my understanding I hope it shed light on the matter, excuse the pun :P

  25. DLS
    • 2 years ago
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    guys im a sweet little cute innocent student :3

  26. DLS
    • 2 years ago
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    simple answers should be awesome :P

  27. Iamgmg90
    • 2 years ago
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    Trying to word equations in english and failing, I don't think quantum mechanics could be simple hehe, are you a student of physics?

  28. DLS
    • 2 years ago
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    yes..XIth grade

  29. Iamgmg90
    • 2 years ago
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    11th grade? I have no idea what that is, I'm English

  30. Iamgmg90
    • 2 years ago
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    is that high school?

  31. DLS
    • 2 years ago
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    kinda

  32. Iamgmg90
    • 2 years ago
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    I think the main part of understand that is knowing planck's constant well

  33. Iamgmg90
    • 2 years ago
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    & the difference between h and hbar

  34. DLS
    • 2 years ago
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    yes,ive read about atomic struc

  35. DLS
    • 2 years ago
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    not hbar

  36. Iamgmg90
    • 2 years ago
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    its just h / 2pi

  37. Iamgmg90
    • 2 years ago
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    but not just, very important for its relationship with angular frequency

  38. Iamgmg90
    • 2 years ago
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    omg sorry in those equations w = angular frequency, not momentum

  39. DLS
    • 2 years ago
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    \[mvr=\frac{nh}{2\pi}\]

  40. DLS
    • 2 years ago
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    :o

  41. Iamgmg90
    • 2 years ago
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    Bohr is far from QM, but orbital win

  42. DLS
    • 2 years ago
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    anyway,thanks guys! ill go with photon for meanwhile :P and/or bosson

  43. Mashy
    • 2 years ago
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    from where Bosson came?? bossons have mass :O !!!

  44. DLS
    • 2 years ago
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    http://prntscr.com/tqp5w

  45. DLS
    • 2 years ago
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    naive theory \m/

  46. Mashy
    • 2 years ago
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    so? it still says higg's particle gives mass!

  47. DLS
    • 2 years ago
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    okay photon :P

  48. Mashy
    • 2 years ago
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    higg's particle has been discovered hello!??

  49. DLS
    • 2 years ago
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    oops I cant give medal to myself D:

  50. Mashy
    • 2 years ago
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    super large hardron collider??

  51. DLS
    • 2 years ago
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    oout off my syllabus :P

  52. Mashy
    • 2 years ago
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    geneva switzerland?? .. 7.7TEV??? hello?!?!

  53. DLS
    • 2 years ago
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    :| thanks everyone

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