state gov MP Excise Constable Mock Test Series 2025 General Science Physics Optics

+2.0 D અને -0.25 D પાવરવાળા બે લેન્સના સંયોજન સમકક્ષ એક લેન્સનો પાવર શું છે?

1
+1.75 D
2
+2.25 D
3
-3.5 D
4
+1.25 D
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