Science as a Human Endeavour: Physics in Society
What you must understand
This domain asks you to explain how physics develops and how it interacts with society, technology and the environment. Be ready to discuss models as provisional (Newtonian mechanics, wave and particle models of light, the Standard Model), the role of peer review, replication, and the interplay of theory and experiment. Understand that scientific claims are evaluated on evidence, not authority, and that consensus forms gradually.
You should also analyse applications and their consequences: renewable and non-renewable energy generation, medical imaging and radiation dose, satellites and communication, nuclear power and waste, and safety standards. Consider stakeholders, cost-benefit trade-offs, ethical constraints and unintended consequences.
Traps
- Claiming a theory is "proven" or "just an opinion"; scientific knowledge is well-supported but revisable.
- Confusing a scientific question with an ethical, economic or political one.
- Attributing a technology to one lone inventor while ignoring the wider research community and prior work.
- Treating a correlation (e.g. mobile phone use and health outcomes) as causation without controlling variables.
Worked example
"Evaluate the claim that nuclear power is the best solution to electricity supply." A strong response separates strands: the physics (high energy density, no direct CO2 during operation), the evidence (accident frequency, waste storage timescales), the economics (construction cost, decommissioning), and the social dimension (public acceptance, proliferation risk). Conclude that "best" depends on weighted criteria, and state which criteria you used. This structure earns marks because it shows that scientific evidence informs but does not alone settle a policy decision.