1. If convex lens of focal lenth "f" is cut laterrally into 2 equal halves. Then focal lenth of eachh part becums "2f".
2. If convex lens of focal lenth "f" is cut horizontally into 2 equal halves. Then focal lenth of eachh part remains same i.e f.
3. If two convex lenses ( or concave lenses) of equal focal lenth are placed in contact, the resultant focal lentg is… " f=f/2"
4. If a convex and a concave lens r placed together then resultatn focal lenth is f = infinity.
P.S. I em not very sure about 2nd point.
Okkk so now i hav memorized these but i wanna understand the way how we evaluate these answers or are these based on any conceptual logic?
Please explain:) it'll b. Big help. Thanks
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