Posted by Bob on Tuesday, June 5, 2012 at 9:48pm.
At what angle to the surface must a submerged diver in a lake look toward the surface to see the setting sun just along the horizon?

Physics  drwls, Wednesday, June 6, 2012 at 3:01am
Let A be the required angle to the VERTICAL.
Snell's law says that, in this case,
N sin A = 1*sin 90 = 1
sin A = 1/N = 0.75
A = 48.6 degrees
where N is the refractive index of water.
The angle they want is 90  A

Physics  Hlengiwe, Thursday, February 18, 2016 at 12:18pm
1sin(theta)=1.33sin (45)
(Theta)=sin^1 (0.940452019)
therefore Theta= 19.87

Physics  Hlengiwe, Thursday, February 18, 2016 at 12:19pm
1sin(theta)=1.33sin (45)
(Theta)=sin^1 (0.940452019)
therefore Theta=19.87 degrees
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