Inference / Conclusion :
1. First focal length of the convex lens (F) ............cm
2. Second focal length of the convex lens (F,)..........cm
3. From 1 and 2 above, is the lens used in this experiment a symmetric lens? (Yes / No)
If F = F, then the lens is symmetric.
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Answer:
fist is f
second is 2f
no lens is not symmertic
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