Hi!
I'm having some trouble with optics.
When we have convex, planoconvex, concave, planoconcave, and meniscus lenses, I don't understand how to substitute with the sign for R1 and R2. How do I determine whether the radius of a side is negative or positive? A book that I'm using said to take...
There's still something a bit confusing about that.. Wouldn't the new image now be a virtual one?.. so the sign convention would be negative for that? But in the original problem. the "virtual object" for the second lens has a negative sign and the final image was given a positive sign.
I read through all of the previous sign convention posts on this forum (and googled a lot and checked a bunch of textbooks) before posting this question. I don't understand the sign convention properly for geometric optics. There are two conventions that I've understood so far, and I've got a...