alleryThe power of a lens is defined as the reciprocal of its:
AFocal level
BFocal length
CFocal line
DFocal limit
Answer & Solution
Correct answer: B. Focal length
1. It measures the degree of convergence.
2. It is represented by the letter P.
3. It is the reciprocal of the focal length.
_Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_
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