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

Theor./Particle: 4-vector notation (gradients, scalars, metrics)

Announcements Posted on
Four hours left to win £100 of Amazon vouchers!! Don't miss out! Take our short survey to enter 24-10-2016
    • Thread Starter

    Not sure if this is the right area to post this, sorry!

    I'm doing a 3rd year Uni (Physics) module on Theoretical Elementary Particle Physics and this is the first time I've had to use 4-vector notation, which I've struggled with grasping.Can anyone recommend any good resources for understanding it? I've looked over my lecture notes and googled resources from other Unis but I keep getting lost amongst the notation!

    I don't quite understand the difference (or use) between metrics, gradients, and scalars. I understand them in the typical sense of course (scalars have no direction, gradients represent change.. not sure about metrics except in vague a space-time sense), just not in this new sense.

    Also, there's an exercise of making a scalar by using a contra-variant vector and a co-variant vector, but I am not sure how it shows that scalars are the same in all (or 2) frames of reference.

    Thanks for any help!
Write a reply…


Submit reply


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: July 31, 2016
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.

What do you wear to bed?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.