What does F1,F2,2F1,2F2 stand for? In light chapter
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in optics f means frequency
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f1 is the first focus where the ray of light moves Parralel. f2 is the second focus where the ray of light. appears to get refracted.
2F1=CENTRE OF CURVATURE. RIGHT SIDE OF LENS. 2F2=CENTRE OF CURVATURE.
Explanation:
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