Saved Bookmarks
| 1. |
(i) Define the power of a lens.(ii) The lens mentioned in 6(b) above is of focal length 25 cm. Calculate the power of the lens. |
|
Answer» (i) The power of a lens is a measure of deviation produced by it in the path of rays refracted through it. (ii) power of lens (in D) = (1/Focal length (in meter)) = (100/Focal length (in centimetre)) = (100/25) = 4D |
|