Jawabanmu

2014-06-04T20:20:07+07:00
PR = 200 cm
P = - 100/PR
P = - 100/200
P = - 1/2 dioptri

Semoga membantu :)
betul banget
Terimakasih Gizka :)
samasama :-)
2014-06-04T20:20:08+07:00
1/f = 1 / so + 1/Si = 1/○○ + 1/ - 200 = 0 - 1 / 200 = -200cm = 2m
kekuatan lensa =1 / f = 1/ -2 = -0,5 dioptri