Question

cata
cq Fav
12) far point of a person to 5m, what do the song he
should use to correct his detect? what is it's
focal length ?​

Answer 1

Explanation:

far point of a person to 5m, what do the song heshould use to correct his detect? what is it's

focal length - Answer = 1m=100cm that's why answer is 100×5=500cm