- #1
Tanishq Nandan
- 122
- 5
Homework Statement
Homework Equations
▪1/f=[(n2/n1)-1][1/R1 -1/R2]
▪1/f(eq)=1/f1 +1/f2
For combination of 2 lens
▪1/f(eq)=1/f(mirror) -2/f(lens)
for combination of lens and mirror
▪1/v+1/u=1/f
Mirror formula
The Attempt at a Solution
I just applied the above equations
1.Finding the individual focal lengths of the two concavoconvex lens using Eq1 (Ccoming as 200 and 400/3)
2.Finding their equivalent focal length using Eq2(coming as 80)
3.Finding equivalent of the lens and mirror using Eq3(coming -40/3).
4.Finally using the simple mirror formula,1/v+1/u=1/f,to find image distance(coming something which isn't the answer)
Is there anything wrong with this method or am I doing any calculation mistake.I MAY have done something wrong with the sign convention while applying Eq1,maybe..maybe not..
Wherever the mistake is,I would be glad if someone points it out.