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    				| 1. | PHYSIODo 20 numerical related to the following topicsMirror Formula-10Lens Formula and Power of lens-10 | 
| Answer» if focal length is in metres then formula for calculating power is p=1/f and if focal length is in centimetres then p=100/f When focal length is calculated in metre then formula for calculating power is[.°. P = 1 / f ] When focal length is calculated in centimetre then formula for calculating power is:[.°. P = 100 / f ] | |