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Physics wave question

  1. May 29, 2009 #1
    1. The problem statement, all variables and given/known data

    the radar on a ship sends out a signal which reflects off a rocky island 1500m ahead of the ship. how much time passes from the time the signal is sent until the reflection is detected?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. May 29, 2009 #2
    2. Relevant equations


    3. The attempt at a solution

    v=c=3.10^8 (m/s)

    s=2.1500=3000 (m)

    t=3000/3.10^8= 10^-5 (s)
  4. May 29, 2009 #3
    but y did u times by 2?
  5. May 30, 2009 #4
    Because the signal is reflected, so it must travel 2 times the distant between the island and the ship (sent, reach the island and come back)
  6. May 30, 2009 #5
    ok great thanks!
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