Posted by confused on Thursday, January 24, 2013 at 3:22pm.
What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333.
I don't even know how to start this or what the formula is. Thanks for your help in advance. It really is appreciated.

Physics  Anonymous, Thursday, January 24, 2013 at 3:37pm
Snell's law:
n1 Sin(theta)=n2 Sin(thea)
Index of refraction of air (n1)=1.00
angle of incidence is 45 to the normal (sin theta)
Index of refraction of lake (n2)=1.33
solve for theta

Physics  confused, Thursday, January 24, 2013 at 3:45pm
Okay so then 1(sin45) = 1.33(sinx)
I got 32.04degrees?

Physics  Anonymous, Thursday, January 24, 2013 at 3:49pm
n1 Sin(theta)=n2 Sin(theta)
Index of refraction of air (n1)=1.00
angle of incidence is 45 to the normal (sin theta)
Index of refraction of lake (n2)=1.33
solve for theta
(1.00/1.33)sin45=sin(theta)
0.544=sin(theta)
sin1 (0.544)=theta
33.0 degrees=theta

Physics  Devron, Thursday, January 24, 2013 at 3:55pm
I got 32.1 degrees. The problem worked out should read
0.532=sin(theta)
sin1 (0.532)=theta
32.1 degrees=theta

Physics  confused, Thursday, January 24, 2013 at 4:22pm
Thank you so much
Answer This Question
Related Questions
 physics  What is the angle of refraction of a light ray that enters the surface...
 Physics  What is the angle of refraction of a light ray that enters the surface...
 Physics  1) The speed of light in a certain liquid is 3/5 the speed in a vacuum...
 Physics  1) The speed of light in a certain liquid is 3/5 the speed in a vacuum...
 Physics  Two light rays, one red and one violet, encounter a glass surface. If ...
 Physics Word Problem  using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where...
 Physics Word Problem  using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where...
 science  A ray of light travelling in air strike the water surface at an angle ...
 physics  A ray of light passes from air into water. The incident angle is 30o. ...
 Physics  A ray of light of vacuum wavelength 550 nm traveling in air enters a ...
More Related Questions