Struggling with Total Internal Reflection? Need Help for Exam Prep?

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Total internal reflection and refraction can be challenging concepts to visualize, especially when preparing for exams. Users are seeking resources and websites that effectively explain these topics and provide clear diagrams. HyperPhysics is recommended as a valuable resource for understanding total internal reflection and refraction. The urgency of the exam on Monday adds to the need for quick and effective study materials. Utilizing reliable online resources can significantly aid in grasping these optical principles.
aurao2003
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Homework Statement


Hi
I wonder if anyone can help. I am having difficulty drawing refracted and total internally reflected rays. I have an exam on Monday. Can anybody recommend good websites that can help? Slight panic.

Thanks



Homework Equations





The Attempt at a Solution

 
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Thanks a lot!
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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