Escape Velocity from a Black Hole's Gravity

2 replies · 2K views · last reply
kingyof2thejring
Messages
82
Reaction score
0

Homework Statement


A black hole has a mass of 2x10^31 kg What is the minimum radius from which a photon can escape its gravity?


Homework Equations





The Attempt at a Solution



does this equation give me the answer "gravitational radius" = (2Gm)/c^2
 

Discussion

Similar threads

Graduate How do mediating photons escape a black hole's gravity?
  • black hole 123
  • · Replies 5 ·
  • Special and General Relativity
Replies
5
Undergrad Escape velocity near a black hole with special relativity
  • Trollfaz
  • · Replies 17 ·
  • Special and General Relativity
Replies
17
High School Photons on a perpendicular bisector path from a black hole's core
  • jaketodd
  • · Replies 4 ·
  • Special and General Relativity
Replies
4
Graduate Time Dilation: Twins Separated by Black Hole's Gravity
  • Dynamotime
  • · Replies 2 ·
  • Special and General Relativity
Replies
2
Why is black hole photon sphere outside the event horizon?
  • Prof. Hawking
  • · Replies 5 ·
  • Advanced Physics Homework Help
Replies
5
Undergrad Reason for a black hole's gravity?
  • Yashbhatt
  • · Replies 12 ·
  • Special and General Relativity
Replies
12
High School Could the Big Bang originate from a black hole's white hole counterpart?
  • CanerKaraca
  • · Replies 5 ·
  • Astronomy, Astrophysics, Cosmology
Replies
5
High School How can particles escape from a black hole?
  • Aaron Maiwald
  • · Replies 12 ·
  • Astronomy, Astrophysics, Cosmology
Replies
12
High School Escape velocity from a sphere moving at relativistic speed
  • Dilema
  • · Replies 2 ·
  • Special and General Relativity
Replies
2
Finding missile acceleration and escape velocity from gravitational speed equation
  • Alexanddros81
  • · Replies 6 ·
  • Introductory Physics Homework Help
Replies
6