MCAT Physics Question — Converging Lens
- Mar 05, 2017
- MCAT Question of the Day
- 0.5 diopters
- 10 diopters
- 25 diopters
- 50 diopters
Click for Explanation
The question stem states that image distance is fixed and equal to a length of 2 cm. Since the question states that the observer stares at a distant object, we can assume that 1/do is negligible and equal to zero. Therefore, the equation simplifies to P = 1/di. Since power is measured in diopters, which has the units of m-1, you must convert 2 cm to 0.02 m and solve. Thus, the power of the lens is equal to 50 diopters, or answer choice D.
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