DLS Group Title Example of any 2 particles which do not exert Gravitational force on each other? one year ago one year ago

1. DLS Group Title

@experimentX @Mashy

2. Mashy Group Title

photons? :P

3. DLS Group Title

I thought of photon but its not exactly massless..it has SOME mass so negligible..but no 0

4. DLS Group Title

timing:D

5. Mashy Group Title

ermm.. is it?.. i thought it had no mass :D

6. DLS Group Title

$\LARGE M_{p}=1.8 \times 10^{-42}g$

7. Mashy Group Title

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 Group Title

if photons dont have mass how do they have momentum?

9. Mashy Group Title

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 Group Title

lol

11. Iamgmg90 Group Title

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 Group Title

Higgs is massless?

13. Iamgmg90 Group Title

DLS look into photoelectric effect derivation and compton scattering

14. Mashy Group Title

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 Group Title

for why it has momentum, no higgs would give more knowledge, it gives mass.

16. DLS Group Title

i know photoelectric effect

17. Mashy Group Title

or maybe not.. you can use general relativity to explain that.. so never mind :D

18. DLS Group Title

The Standard Model's explanation of why some fundamental particles have mass when 'naive' theory says Higgs boson should be massless

19. DLS Group Title

so can we say photon photon and boson boson :O

20. DLS Group Title

@Mashy dude stop showing off relativity in every question of mine when u know i dont understand it :P

21. Iamgmg90 Group Title

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 Group Title

wait for @Iamgmg90 something bombastic is on its way.. either that or his computer is stuck :D

23. Mashy Group Title

ok sorry DLS :P.. didn't mean to!

24. Iamgmg90 Group Title

Bombastic haha, its just my understanding I hope it shed light on the matter, excuse the pun :P

25. DLS Group Title

guys im a sweet little cute innocent student :3

26. DLS Group Title

simple answers should be awesome :P

27. Iamgmg90 Group Title

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 Group Title

29. Iamgmg90 Group Title

11th grade? I have no idea what that is, I'm English

30. Iamgmg90 Group Title

is that high school?

31. DLS Group Title

kinda

32. Iamgmg90 Group Title

I think the main part of understand that is knowing planck's constant well

33. Iamgmg90 Group Title

& the difference between h and hbar

34. DLS Group Title

35. DLS Group Title

not hbar

36. Iamgmg90 Group Title

its just h / 2pi

37. Iamgmg90 Group Title

but not just, very important for its relationship with angular frequency

38. Iamgmg90 Group Title

omg sorry in those equations w = angular frequency, not momentum

39. DLS Group Title

$mvr=\frac{nh}{2\pi}$

40. DLS Group Title

:o

41. Iamgmg90 Group Title

Bohr is far from QM, but orbital win

42. DLS Group Title

anyway,thanks guys! ill go with photon for meanwhile :P and/or bosson

43. Mashy Group Title

from where Bosson came?? bossons have mass :O !!!

44. DLS Group Title
45. DLS Group Title

naive theory \m/

46. Mashy Group Title

so? it still says higg's particle gives mass!

47. DLS Group Title

okay photon :P

48. Mashy Group Title

higg's particle has been discovered hello!??

49. DLS Group Title

oops I cant give medal to myself D:

50. Mashy Group Title

super large hardron collider??

51. DLS Group Title

oout off my syllabus :P

52. Mashy Group Title

geneva switzerland?? .. 7.7TEV??? hello?!?!

53. DLS Group Title

:| thanks everyone