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Calculate the actual depth of the trout

  1. Jan 15, 2010 #1
    Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's observing the trout is 45 degrees.

    a) draw a diagram to show the ACTUAL depth of the trout and the path of light from the trout to Sam's eyes
    b) Calculate the actual depth of the trout

    ni=1.33 for water (the "i" stands or incident)
    nR=1.00 for air (to 3 significant digits) (the "r" stands for refracted)

    sinangle1=[(nR)(sinangleR)] divided by ni
    =(1.00)(.707) divided by 1.33

    I don't know where to go from here...please help.
  2. jcsd
  3. Jan 15, 2010 #2
    Can you do what the question asks and draw a diagram of the light rays striking the fishermans eyes? What happens at the surface?

    Is it bent towards or away from the fisherman? If you know that, it becomes a problem in geometry.
  4. Jan 15, 2010 #3
    sorry, I still don't understand.please explain more.
  5. Jan 15, 2010 #4
    I would guess that the rays of light striking the fisherman's eyes are bent toward the fisherman's eyes.
  6. Jan 16, 2010 #5
    Hee, hee poorly worded.

    Words are way too often a lousy substitute for math and a diagram. So correct that which should read whether the rays reflected from the fish were directed above or below his eyes before hitting the surface.
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