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Class 10 Science Medium Mcq English Medium

The additive property of lens powers is particularly useful in optician's practice mainly because it allows net power by simple addition

Question
The additive property of lens powers is particularly useful in optician's practice mainly because it allows net power by simple addition
opticians to avoid using any lenses at all
opticians to combine several corrective lenses of known power (in contact) and calculate
focal lengths to be measured without any calculation
power to be irrelevant during eye testing
Answer
opticians to combine several corrective lenses of known power (in contact) and calculate
Detailed Explanation
The chapter explains that this additive property lets opticians combine several lenses of known power during eye-testing and calculate the required total power by simple algebraic addition.
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