A question on the deflection of light

  • 1 Replies
  • 1190 Views

0 Members and 1 Guest are viewing this topic.

*

Offline jeffreyH

  • Global Moderator
  • Neilep Level Member
  • *****
  • 4054
  • The graviton sucks
    • View Profile
A question on the deflection of light
« on: 23/12/2014 19:07:30 »
Since the speed of light exceeds the escape velocity of most celestial bodies, with the exception of black holes, is there a minimum mass required to cause a noticeable deflection of light. I am asking this in relation to gravitational lensing.

*

Offline syhprum

  • Neilep Level Member
  • ******
  • 3886
    • View Profile
Re: A question on the deflection of light
« Reply #1 on: 23/12/2014 20:58:43 »
Unless you assume gravity is quantitised there is no minimum mass but the mass of the deflecting body determines the effective focal length which cannot of course exceed the size of the universe.
syhprum