focal length

a convex lens with focal length f is trisected parallel to the optical axis.what's the new focal length?

4 Answers

do u mean u r cutting d lens into 3 parts and removing d top and d bottom one????

then....

it remains SAME

trisected means
how many parts remain
then 3 parts or 4 parts

bisected means 2 parts remain....
trisected means 3 parts remian....

i hope...

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