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!

Uncertainity regarding measurement

  1. Mar 29, 2013 #1
    Hello,

    I was viewing a lecture of one of the professor's most possibly in MIT who demonstrated in the class room, by calling a boy and measuring him, while standing, a certain measurement say 5 ft. After that he asked the boy to lie down and again measured him and found that there is a difference, say +- some amount. He concluded that there is always a uncertainty in measurement while standing and the same person lying down.

    Can anybody please explain me the reason? Why?

    Thanks.
     
  2. jcsd
  3. Mar 30, 2013 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    What changes occur to the boy standing versus laying down?
     
  4. Mar 30, 2013 #3
    Nothing physically. The measurement rod shows the difference. Can you tell me the reason please?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Uncertainity regarding measurement
  1. Uncertain Gravity ? (Replies: 2)

  2. Uncertainity Qns (Replies: 1)

  3. Is the past uncertain? (Replies: 10)

Loading...