Question: Two identical television signals are sent between two cities that are 400.0 km apart. One signal is sent through the air, and the other signal

Two identical television signals are sent between two cities that are 400.0 km apart. One signal is sent through the air, and the other signal is sent through a fiber optic network. The signals are sent at the same time but the one traveling through air arrives 7.7 × 10−4s before the one traveling through the glass fiber. What is the index of refraction of the glass fiber?

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