If the power of the lens of an eyeglass is + 2 diopters. Then its focal length will be

The focal length of a lens (C) with a power of +2 diopters is 50 cm. Power (in diopters) is the reciprocal of the focal length in meters. Given a lens power of +2D, the focal length can be calculated as 1 divided by 2, resulting in 0.5 meters or 50 cm. This positive diopter value indicates that the lens is a converging lens, which focuses parallel light rays to converge at a point 50 cm away from the lens. This property is utilized in correcting conditions like hyperopia (farsightedness), where the lens helps to bring nearby objects into focus by adjusting how light converges within the eye. Understanding the relationship between lens power and focal length is crucial in optometry for prescribing lenses that correct vision impairments and in designing optical systems where precise light focusing is required. Therefore, the focal length of a +2 diopter lens is 50 cm, aligning with its optical characteristics and applications.