Is there any kind of value to this rock. It appears to be in decomposed granite. Also, does this continue to quot;growquot; outside of its quot;nativequot; area and if any, can you speed the process up? It came from my dad's old gold mine. I have absolutely no idea or formal training in geology, so this is all new to me.
Use Snell's Law. If n1 is the index of refraction of air, n2 the index of refraction of quartz, θ1 the angle of incidence, and θ2 the angle of refraction, then n1 sinθ1 = n2 sin θ2. Now the index of refraction is n1 = 1. So sinθ1 = n2 sinθ2, and dividing both sides by sinθ2 gives n2 = sinθ1/sinθ2. Now θ1 = 27.0 and θ2 = 18.5. So n2 = sin27.0/sin18.5 = 1.43. So the index of refraction for the quartz is 1.43.
