Question Constellation Sign up for free AQA · GCSE · Physics · Higher
Testing Direct Proportionality in Refraction
How does Figure 2 show that the angle of refraction is not directly proportional to the angle of incidence?
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Marking points
- 1 Identifies that the line curves or is not straight.
Full-mark answer
The line curves rather than being a straight line.
Why this answer loses marks
Both angles increase, so they are directly proportional.
Increasing together shows positive correlation only; the curve means the ratio is not constant.