Question: You want to strike a particular target on the wall in the air above you with a laser pointer held from underwater. Given that

You want to strike a particular target on the wall in the

You want to strike a particular target on the wall in the air above you with a laser pointer held from underwater. Given that water has an index of refraction of 1.33 and air an index of refrection of 1.00, what angle incident to the surface of water from below in degrees must you hold the laser pointer so that it refracts into the air at 45.0 to strike the wall where you intend to three significant digits?

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