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: Finding the time of an event

  1. Jul 22, 2010 #1
    2jdf2c0.jpg

    here this time for the experimenter A t=4 micro sec and for B t=3 micro sec.

    shouldn't they see the light at when light reaches there as in At=2 micro sec and Bt= 1micro sec.

    i do not get this example could someone explain this to me.

    thanks in advance
    Seto
     
  2. jcsd
  3. Jul 22, 2010 #2
    If you read carefully after the Solve portion, it says the explosion occurred at 2 microseconds into the 'time frame', which simply adds 2 microsec. to what you are stating, so 4 and 3 respectively for observers A and B. It does only take 2 microsecs and 1 microsec to reach A and B, but the problem is essentially trying to get you to find when the explosion occurred.
     
  4. Jul 22, 2010 #3
    i mean in stead of At=4 and Bt=3 shouldnt it me like At=2 and Bt=1?

    when light reaches there they should be able to see it..so where does the extra 2 for At and extra 2 for Bt come from
     
  5. Jul 22, 2010 #4
    oh its the time at which explosion took place
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook