1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Of order unity

  1. Nov 22, 2005 #1
    While reading a physics text, I came across an equation
    [tex]l' = l + \alpha\,a[/tex], where [tex]\alpha[/tex] is the order of unity. What exactly does this phrase mean (ie if I knew l and a, what would [tex]\alpha[/tex] be?)
    Last edited: Nov 22, 2005
  2. jcsd
  3. Nov 22, 2005 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Guess what was written was " is of order unity", no ?

    It means that [itex] \alpha[/itex] is a number that is not very far from 1, say 2 or 3 or so. Not 12352.0 and not 0.00002345.
  4. Nov 22, 2005 #3
    Yes, that is exactly what was written.
    so if I am doing a calculation based on this statement, what could I give the value of l' to be assuming I knew the precise values of l and a?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook