10 Books that Screwed Up the World: And 5 Others That Didn't Help

10 Books that Screwed Up the World: And 5 Others That Didn't Help

Ujian Nasional Sekolah Menengah Atas Sebuah benda setinggi 10 cm berada di depan lensa cekung dengan jarak 30 cm. jika jarak fokus lensa 20 cm, hitunglah jarak bayangan

Sebuah benda setinggi 10 cm berada di depan lensa cekung dengan jarak 30 cm. jika jarak fokus lensa 20 cm, hitunglah jarak bayangan

Jawaban:

= -12 cm

Penjelasan:

s = 30 cm

h¡ = 10 cm

f = 20 cm –> f = -20 cm ( cermin cekung bernilai Negatif )

s' = ?

[tex] \: [/tex]

masukan nilainya,

1/f = 1/s' + 1/s

1/-20 = 1/s' + 1/30

-1/s' = 1/30 + 1/20

-1/s' = 40/1200 + 60/1200

-1/s' = -100/1200

s' = -1200/100

s' = -12 cm

[answer.2.content]