# 1_Lensa - Lensa A.Tujuan 1 2 3 4 Mengamati pembiasan oleh...

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Lensa A.Tujuan 1. Mengamati pembiasan oleh lensa positif. 2. Mengamati pembentukan bayangan nyata oleh lensa positif. 3. Menghitung jarak lensa positif. 4. Mengamati sifat pembentukan bayangan lensa positif. B.Dasar Teori 1. Pada setiap lensa berlaku , atau dan . 2. Juga berlaku :

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C.Alat dan Bahan 1. Lensa pofitif 5. Sumber daya listrik 2. Lampu 6. Penggaris 3. Layar 7. Kalkulator 4. Bangku optic D.Tugas dan Pertanyaan 1. Lakukan pengukuran dan lengkapi table (1) berikut : No L d 4L L 2 d 2 f=… Δf cm cm cm cm 2 cm 2 cm cm 1 70 33 280 4900 1089 13,61 0,05 2 75 39 300 5625 1521 13,68 0,12 3 80 45 320 6400 2025 13,67 0,11 4 60 18 240 3600 324 13,65 0,09 5 95 64 380 9025 4096 12,97 0,59 6 100 67 400 10000 4489 13,78 0,22 f rata-rata 13,56 0,2 * rata-rata x 100% = 100% = 1,47% 2. Hitung: a.
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