Exam-style question
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What is the relationship between the optical power of a lens and its focal length?.
Model answer
What a good answer should say
- The optical power (P) of a lens is inversely related to its focal length (f).
- This relationship is given by the formula P = 1/f, where P is measured in diopters (D) and f is in meters (m).
Explanation
Why this works
This question tests the understanding of the fundamental relationship between optical power and focal length, which is crucial in optics. A strong answer correctly identifies the formula and explains the inverse relationship.
Common mistake
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