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January 30, 2015

January 30, 2015

Posted by **Susan** on Tuesday, April 9, 2013 at 11:00am.

- physics -
**Steve**, Tuesday, April 9, 2013 at 12:35pmrealdepth/apparentdepth = refractive index of water.

Since water's r.i. = 4/3,

the actual depth is 4/3 * 20 = 80/3 = 26.7 cm

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