Tag: dioptre

Len’s power is defined as the reciprocal of its focal length f, expressed in meters. The formula is P=1/f. P = \frac{1}{f}P=f1​. For example, a lens with a focal length of 0.5 meters has a power of 10.5=2\frac{1}{0.5} = 20.51​=2 D. Series Combination: When lenses are placed in series (one after the other), the total…