A) Convex, 9 cm
B) Concave, 9 cm
C) Convex, 25 cm
D) Concave, 25 cm
Correct Answer: A
Solution :
\[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=-\frac{{{f}_{1}}}{{{f}_{2}}}\Rightarrow \frac{5}{3}=\frac{-(-15)}{{{f}_{2}}}\Rightarrow {{f}_{2}}=9\]\[cm\]You need to login to perform this action.
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