Given: The lens power is \( P = +2 \, \text{D} \). Step 1: Apply the power formula The lens power formula is: \[ P = \frac{1}{f} \] where \( P \) denotes power in diopters and \( f \) denotes focal length in meters. Step 2: Isolate focal length Rearrange the formula to solve for \( f \): \[ f = \frac{1}{P} \] Step 3: Input the power value Substitute \( P = +2 \, \text{D} \) into the formula: \[ f = \frac{1}{2} = 0.5 \, \text{m} \] Answer: The solution is option (1): 0.5 m.