Sebuah mikroskop memiliki panjang fokus lensa objektif dan okuler masing 10 cm dan 5cm. jika jarak antara lensa objektif dan lensa okuler adalah 35 cm dan mata tidak berakomodasi tentukan pembesaran total mikroskop
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D = 35 cm fok + sob' = 35 cm sob' = 35 - 5 = 30 cm
1/fob = 1/sob + 1/sob' 1/10 = 1/sob + 1/30 1/sob = 1/15 sob = 15 cm
M = Sob'/sob × Sn/fok M = 30/15 × 25/5 = 2 × 5 = 10
fok + sob' = 35 cm
sob' = 35 - 5 = 30 cm
1/fob = 1/sob + 1/sob'
1/10 = 1/sob + 1/30
1/sob = 1/15
sob = 15 cm
M = Sob'/sob × Sn/fok
M = 30/15 × 25/5 = 2 × 5 = 10