To find the focal length of a convex mirror, a student records the following data: | ||||||||
| ||||||||
Then taking index correction to be negligibly small, \[{{f}_{1}}\]and \[{{f}_{2}}.\] are close to: [JEE ONLINE 09-04-2016] |
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 :
[d] For convex lens |
u = - 10 cm |
v = 39 cm |
For convex mirror |
You need to login to perform this action.
You will be redirected in
3 sec