Question

define 1 dioptre of power of a lens.​

Answer 1

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.

have a nice day

Answer 2

$\large \green { \fcolorbox{purple}{WHITE}{ \: \textsf{\ \ \ \ddag \ \ \ \ \ \red{QUESTION}\ \ \ \ \ \ddag \ \ \ }}}$

☞define 1 dioptre of power of a lens.

___________________________________

$\large \green { \fcolorbox{purple}{WHITE}{ \: \textsf{\ \ \ \ddag \ \ \ \ \ \green{ANSWER}\ \ \ \ \ \ddag \ \ \ }}}$

➢ 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.

➢1 dioptre (D) = P = 1/f

Where f = focal length

___________________________________

• ☺️