Cermin cekung mempunyai jari-jari kelengkungan 18 cm.Sebuah benda yang tingginya 4 cm diletakkan 15 cm di depan cermin itu. Hitunglah:a.s'... b.M... c.h'...
Tolong dijawab yha?penting.... Terima kasih
dominika
Pertama cari f dulu, f = 1/2R = 1/2 (18 cm) = 9 cm a. 1/f = 1/s + 1/s' 1/9cm = 1/15cm + 1/s' 1/9cm - 1/15cm = 1/s' 5 - 3 / 45 cm = 1/s' 2/45 cm = 1/s' 45 cm/2 = s' 22,5 cm = s'
b. M = |s'/s| = |22,5 cm/15 cm| = 1,5
c. M = |h'/h| 1,5 = |h'/4cm| 1,5 x 4 cm = h' 6 cm = h'
a. 1/f = 1/s + 1/s'
1/9cm = 1/15cm + 1/s'
1/9cm - 1/15cm = 1/s'
5 - 3 / 45 cm = 1/s'
2/45 cm = 1/s'
45 cm/2 = s'
22,5 cm = s'
b. M = |s'/s| = |22,5 cm/15 cm| = 1,5
c. M = |h'/h|
1,5 = |h'/4cm|
1,5 x 4 cm = h'
6 cm = h'