Object pin | Convex Lens | Convex Mirror | Image Pin |
22.2 cm | 32.2 cm | 45.8 cm | 71.2 cm |
A) \[{{f}_{1}}=15.6cm\] \[{{f}_{2}}=25.4cm\]
B) \[{{f}_{1}}=7.8cm\] \[{{f}_{2}}=12.7cm\]
C) \[{{f}_{1}}=7.8cm\] \[{{f}_{2}}=25.4cm\]
D) \[{{f}_{1}}=12.7cm\] \[{{f}_{2}}=7.8cm\]
Correct Answer: D
Solution :
For convex lens i. I u =.10 cm v = 39 cm \[{{f}_{1}}=\frac{uv}{u-v}\] \[=\frac{390}{49}=7.8cm\]For convex mirror \[R=25.4cm\] \[{{f}_{2}}=12.7cm\]You need to login to perform this action.
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