Question

calculate focal length of lens when power is 6 diapter​

Answer 1

Answer:

P=6D

P=1/f

6=1/f

f=1/6

f=0.167m

Hence, the focal length is 0.167m when power is 6D.

Answer 2

Answer:

For example, suppose an object is at 1/2 meter. Converted to centimeters, the object is 50 cm away. Divide 100 by 50 and the result is 2 D of power needed to focus at this distance. The formula to remember is D = 100/F, where D is diopters and F is the focal length (or distance) in centimeters

u can see this and solve by your own