How does light bend under gravitational field(gravitational force), why?

  1. As I have heard that light bends under the gravitational force. While according to formula "w=mg", gravitation acts on objects that have mass, but light has no mass if it is considered as photon nature.
    And also if light bends under gravitational FORCE then light velocity must changes(acceleration produces) according to formula, "F=ma"(force acts on an object produces an acceleration in that object) while light has constant speed i.e. c=3x108m/s.
    How will you satisfy me about my both upper statements?
  2. jcsd
  3. ZapperZ

    ZapperZ 29,767
    Staff Emeritus
    Science Advisor
    Gold Member

    Please start by reading an entry in the FAQ thread in the General Physics forum.

  4. Great, thanks. I have gotten my answer.
Know someone interested in this topic? Share a link to this question via email, Google+, Twitter, or Facebook

Have something to add?