Answer:
transmitting telephone signals
Explanation:
Based on the principle of total internal reflection, fiber optics has revolutionized telecommunication. Fiber optics are made of very thin plastic or drawn out glass. Signals enter this hollow tube at critical angle and reflect internally and transmit ahead. Signals can be transmitted to long distances without any noise and attenuation.
Answer: B.)transmitting telephone signals
Explanation: i hope this helps :)
