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(a) At the end of Example 25.4 , it was stated that the critical angle for light going from diamond to air is $24.4^{\circ} .$ Verify this. (b) What is the critical angle for light going from zircon to air?

Part $(\text { a }) : 24.4^{\circ} .$Part $(\mathrm{b}) : 31.4^{\circ} .$

Physics 103

Chapter 25

Geometric Optics

Reflection and Refraction of Light

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but a off the given problem were asked, defying the critical angle for a light when it goes out off the diamond. But this is a diamond going one to the air. We can find this critical angle from Snell's law that is worse off the refracting. Next off, the second medium lists into first media MRIs and one here. So diamond and two, we have his air, which is one divided by the end of one, which is a 2.42 for the diamond. Then, uh, we can write critical angle. This becomes so we find this expression uses critical angle for a diamond is 24.4 degrees. We bought these. We'll use the same sturdy to find the critical angle for light coming out of the crowd that easy and worse off the, um, again using the same formula. So you just write a formal here also, that they signed in worse off, um, signed in worse. No fear. Times are and two or in one here. Okay, so for his sake, Ron and two were in one here, substituting the values that is in war. Sign it yourself and two is won again and won the heavies 1.92 not to seek to find this expression uses the anthologies that 1.4 degrees.

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