Question

define the power of lens what is the meaning of power of lens in 1 diopter if the power of lens is -2 diopter then what type of lens is that when an object is kept at infinity from these types of lens what is the size of the image formed​

Answer 1

Answer:

1 dioptre of power of a lens is described as the unit of measurement of the optical power of a lens or curved mirror equivalent to the reciprocal of focal length (f). Measurement of the focal length in a meter. The SI unit of power of lens is dioptre whose focal length is one meter, which is denoted by the letter D