Photo AI
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 for island B
Answer
The communication system for island B will utilize a fibre optic cable connected to the mainland, allowing high-speed data transmission. The light rays travel through the fibre via total internal reflection (TIR) ensuring minimal loss of signal. This solution is ideal for transmitting large amounts of data necessary for a developed holiday resort, such as booking systems and guest communications.
Additionally, a satellite link can be integrated to provide coverage for scenarios where the cable connection may be inconvenient, particularly in areas with challenging terrain or for providing backup services. The satellite can handle broadband communications, making it suitable for accessing internet services and video conferencing.
Step 2
Outline the way each communications system operates for oil rig C
Answer
For oil rig C, the communication system will primarily rely on satellite communication. Given the mobile nature of the rig, a satellite link allows for flexible communication regardless of the rig's position in the ocean. It utilizes a high-frequency microwave band (typically around 12 to 18 GHz) for uplink communications, allowing clear transmission of data and voice.
In addition, a mobile satellite dish can be employed which can automatically orient itself to communicate effectively with satellites in geostationary orbit. This ensures that data is transmitted efficiently from the rig to the mainland for real-time monitoring and operational support.
Step 3
Suggest, with reasons, your choice of system for island B
Answer
For island B, the recommended system choice is the fibre optic cable. The reasons for this choice include:
- High Data Capacity: Fibre optics provide a significant advantage in bandwidth, essential for a fully developed resort needing high-speed internet services.
- Reliability: A fibre connection tends to be more reliable with lower latency compared to satellite connections, ensuring consistent service for both operational and guest-related applications.
- Cost-Effectiveness: While the initial setup may have higher costs, over time, operating costs are lower compared to satellite communications, especially for large data transmissions.
Step 4
Suggest, with reasons, your choice of system for oil rig C
Answer
For oil rig C, the preferred solution is satellite communication. Key reasons include:
- Mobility: Given the rig's movement, satellite communication offers flexibility and can maintain connectivity irrespective of location.
- Real-Time Communication: This solution allows for immediate reporting and data sharing with the mainland, critical for safety and coordination in oil exploration.
- Ease of Setup: Unlike installing extensive cabling at sea, a satellite dish can be set up relatively quickly and can provide coverage as the rig moves.