Q

A converging lens of power 4.50 D and a diverging lens of power magnitude 3.00 D are placed together. What is the combined power?

RRB Technicians Grade-III 20/12/2024 / Shift-III 2024
✓ Answer: C +1.5 D
The signed powers are +4.50 D and -3.00 D, so the sum is +1.50 D.
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