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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
Fibre Optic System
The fibre optic system operates on the principle of total internal reflection (TIR). Light signals are transmitted through thin glass or plastic fibers, allowing for high-speed data transmission with minimal loss.
- Data Transmission: Light signals carry the data, transmitted at high frequencies. The use of multiple fibres can facilitate simultaneous data streams.
- Connection to Island B: For island B, a robust fibre optic network can be set up, allowing for high-speed internet access, essential for tourism and communications.
Satellite Communication
Satellite communication involves sending and receiving data via satellite dishes. This system enables connectivity even in remote areas.
- Up-link and Down-link: The data is transmitted from the ground station to the satellite (uplink) and from the satellite back to the ground (downlink).
- Coverage: This will provide a reliable communication medium for island B, especially necessary for emergency services and tourist communication.
Step 2
Suggest, with reasons, your choice of system for each solution
Answer
Solution for Island B
I recommend the fibre optic solution for island B due to its high capacity for data transmission and low latency. It can easily support the needs of the developing resort, including internet services for businesses and tourists. The initial installation may be costlier, but the long-term benefits in service quality justify this.
Solution for Oil Rig C
For oil rig C, I suggest using a satellite communication solution. Given the rig's mobile nature and potential distance from the mainland, a satellite link provides the necessary flexibility and coverage. It can ensure constant communication for operations without the constraints of physical cabling, thus enhancing safety and operational efficiency.