Saved Bookmarks
| 1. |
A point object is placed in front of a silvered plano convex lens of refractive index n radius of curvature R, so that its image is formed on itself. Then the object distance is equal to |
|
Answer» `R//2n` `(1)/(F)=(1)/(f_(t))+(1)/(f_(l))+(1)/(f_(m))` where `f_(m)=R//2` & `(1)/(f_(l))=(n-1)((1)/(OO)-(1)/(-R ))=(n-1)/(R )` `rArr (1)/(f)=(2(n-1))/(R )+(2)/(R )=(2n)/(R )rArr f=(R )/(2n)` `rArr 2f=(R )/(n)` 
|
|