[College Physics II: Waves/Optics] Index of Refraction

AI Thread Summary
To prevent the visibility of a dark spot at the center of a solid glass cube with an index of refraction of 1.75, the minimum radius of black paper circles on each face must be calculated. The discussion centers around applying Snell's Law and the concept of total internal reflection to determine this radius. A user initially expressed confusion about how to approach the problem but later confirmed they found the solution. The hints provided emphasized the importance of total internal reflection in solving the problem. The conversation highlights the collaborative nature of problem-solving in physics.
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Homework Statement


A solid glass cube with edge length of 10.0 mm and index of refraction n=1.75 has a small, dark spot dead center of the cube. Find the minimum radius of black paper circles that could be pasted at the center of each cube face to prevent the center spot from being seen, no matter what the direction of viewing.
Picture (link)
jh1AnCK.png

Homework Equations


Snell's Law (maybe?)
n1/n2=sin(θ2)/sin(θ1)

The Attempt at a Solution


I'm really confused where to even start. A hint in the right direction is all I'm hoping for. Thank you for your time.
 
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Hint: total internal reflection.
 
Simon Bridge said:
Hint: total internal reflection.
I was able to figure it out. Thank you!
 
Well done and no worries :)
 

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