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प्रश्न
It is possible for two lenses to produce zero power?
उत्तर
- Yes, possible
- If one lens is a converging lens with some focal length so that its power is P1 = P.
- The other lens is a diverging lens with the same focal length with a negative sign, so that its power is P2 = -P.
- The combination of these two lenses is given by
Ptotal = P1 + P2 = P + (-P)
P = 0
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