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light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.72 ns to travel the length of the tube, but when the tube is filled with a transparent jelly, the light takes 1.82 ns longer to travel its length. What is the refractive index of this jelly

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Answer:

not sure. I'll try answering this later

Explanation:

I'm not sure. I'll try answering this later

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