A) + 18.75 cm and convex lens
B) - 18.75 cm and concave lens
C) + 20.25 cm and convex lens
D) - 20.25 cm and concave lens
Correct Answer: A
Solution :
\[u=-\,25\,\,cm,\,v=+\,75\,cm\] \[\Rightarrow \]\[\frac{1}{f}=\frac{1}{+75}-\frac{1}{-25}\Rightarrow f=+18.75\]cm ; convex lens.You need to login to perform this action.
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