What is the maximum radius that this circle could have?

AI Thread Summary
The discussion centers on determining the maximum radius of a circle illuminated by a point source of light submerged 2.6 meters below a lake's surface. Participants emphasize the importance of understanding the refraction of light as it transitions from water to air, using Snell's Law (n1sin(θ1) = n2sin(θ2)) to analyze the angles of incidence and refraction. Visualizing the light rays and their interactions at the water's surface is crucial for solving the problem. The refractive indices of air and water are noted, with air at 1.00 and water at 1.33. Ultimately, the maximum radius of the illuminated area depends on these principles of optics.
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A point source of light is submerged 2.6 m below the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the area illuminated is a circle. What is the maximum radius that this circle could have?

No idea where to begin this one - nair = 1.00 nwater = 1.33 and
n1sin01 = n2sin02
 
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Draw yourself a picture showing various rays of light emitted in all directions. What happens as they hit the surface of the water? Examine how the angle of incidence relates to the angle of refraction.
 
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