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c. Pemantulan pada Cermin Cembung<br />

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Contoh 6.4<br />

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SU<br />

O<br />

f<br />

Gambar 6.15<br />

Bagian-bagian cermin cembung<br />

R = jari-jari kelengkungan cermin<br />

P = titik pusat kelengkungan cermin<br />

F = titik fokus cermin<br />

f = jarak titik fokus ke cermin<br />

b<br />

a<br />

c<br />

Cahaya dan Optika<br />

F P<br />

R<br />

O F P<br />

Gambar 6.16<br />

Sinar-sinar istimewa pada cermin<br />

cembung<br />

O F P<br />

Gambar 6.17<br />

Lukisan pembentukan bayangan oleh<br />

cermin cembung<br />

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