Hey! Sign in to get help with your study questionsNew here? Join for free to post

Converging Lens Focal Length

Announcements Posted on
Take our survey to be in with the chance of winning a £50 Amazon voucher or one of 5 x £10 Amazon vouchers 24-05-2016
  1. Offline

    ReputationRep:
    Is the focal length of a converging lens always positive - irrespective of whether it forms a real or virtual image?
  2. Offline

    Yes if you are using the "real is positive" sign convention for the lens formula.
    In this, all real object and image distances are positive, and the focal lengths of converging lenses are always positive.
    Virtual image and object distances, and the focal lengths of diverging lenses are negative.
  3. Offline

    ReputationRep:
    Thank you!

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: April 3, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Today on TSR

OCR Physics Breadth exam

Chat about the exam here

Poll
Are you registered to vote in the EU referendum?
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.