Vikas TU
Last Activity: 8 Years ago
We can calculate the effective focal length can be calculated using this formulae =
Feff = f1f2(f1+f2 –d)
1/ Feff = 1/ f1 + 1/ f2 – d/ f1f2
Here f1 and f2 is negative and d is positive.
f1 = f2 = -ve = -f
Since d = 0
Then effective focal length will be = -f/2
Then using the lens formulae
Then from this v =-f/2
Hence the image is virtual, erect and diminshed