1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Vector question

  1. Mar 10, 2009 #1
    What is meant by this sentence:

    "In a cubic system, all directions of the vectors [100], [010], [001], [tex][bar{1} 00][/tex], [tex][0 bar{1} 0][/tex], and [tex][00 bar{1}][/tex], areequivalent and indistinguishable."

    They point in different directions!
  2. jcsd
  3. Mar 10, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    I assume they are talking about a crystal here. Then the statement just says that you cannot tell along which of the given vectors you are looking by examining the crystal.
  4. Mar 11, 2009 #3
    Is plane (1 1 2) identical to (-1 -1 -2), or are they just parallel?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook