Posted by alex giroux on Sunday, January 8, 2012 at 1:53pm.
The angle of incidence above the water is 45 degrees, because of the equal stick and shadow lengths above the water.
Then with half the stick above the water, the top of the stick's shadow hits the water 0.60 m from the stick. Then it proceeds below the water at a smaller angle of refraction given by Snell's law.
0.60 m times the tangent of the refraction angle (added to 0.60 m) will tell you where it hits the bottom of the pool.
The index of refraction (1.71) that they tell you to use for saltwater is much too high, but they probably expect you to use it anyway.
Related Questions
Physics - On a sunny day, a 1.20 m long vertical stick in air casts a shadow 1....
physics - At 08:00hrs a 2.0- m-long vertical stick in air casts a shadow 1.8 m ...
physics - At 08:00hrs a 2.0- m-long vertical stick in air casts a shadow 1.8 m ...
Physics - At 08:00hrs a 2.7- m-long vertical stick in air casts a shadow 1.8 m ...
Physics - At 10:00hrs a 1.5- m-long vertical stick in air casts a shadow 1.4 m ...
math - On a sunny day, a tree casts a shadow 60 feet long. At the same time, a ...
math - on a sunny day a tree casts a shadow that is 146 feet long. at the same ...
geometry - On a sunny day an office building casts a shadow that is 80 feet long...
Algebra - Ameter stick casts a shadow 1.4 m long at the same time a flagpole ...
math - On a sunny day an office building casts a shadow that is 80 feet long. At...
For Further Reading
