ICSE Class 10 Physics 2014 Solved Paper

© examsnet.com
Question : 40
Total: 66
The lens mentioned in 6(b) above is of focal length 25cm. Calculate the power of the lens.
Solution:  
Given : f=25cm=0.25m
Power of lens (in D)
=
1
Focal length (in metre)

=
1
0.25
=
100
25
=4D.
© examsnet.com
Go to Question: