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Figure 8 shows island A, a fully developed island off the mainland coast - AQA - A-Level Physics - Question 5 - 2022 - Paper 8
Question 5
Figure 8 shows island A, a fully developed island off the mainland coast. The island is connected to the mainland by a fibre optic cable lying along the seabed and i... show full transcript
Worked Solution & Example Answer:Figure 8 shows island A, a fully developed island off the mainland coast - AQA - A-Level Physics - Question 5 - 2022 - Paper 8
Step 1
Outline the way each communications system operates
Answer
The fibre optic communication system operates using light signals transmitted through thin strands of glass or plastic. The light rays are guided through total internal reflection (TIR), allowing for high-speed data transmission with minimal loss over long distances. In the case of island B, a fibre optic cable can be laid from the mainland to support essential services and high-speed internet access for the holiday resort. On the other hand, the satellite communication system utilizes radio waves transmitted to and from satellites in orbit. Signals are sent from a ground station to a satellite, which then relays the signal back down to another ground station, thereby facilitating communication in remote areas like oil rig C.
Step 2
Suggest, with reasons, your choice of system for each solution
Answer
For island B, the proposed solution is to implement a fibre optic network due to its high bandwidth capacity and reliability, which are essential for supporting numerous facilities and services in a fully developed resort. This is also beneficial for providing high-speed internet and other telecommunication services.
For oil rig C, a satellite communication system is more suitable because it can provide connectivity in areas where laying cables might be impractical. Satellites offer wide coverage and the ability to easily transmit data back to the mainland. Moreover, satellite communications are robust and can operate under varied weather conditions, making them ideal for mobile installations like the oil rig.