The refractive index of a material of a planoconcave lens is 5/3, the radius of curvature is 0.3 m. The focal length of the lens in air is |
|||||||
a) |
-0.45 m |
b) |
-0.6 m |
c) |
-0.75 m |
d) |
-1.0 m |
The refractive index of a material of a planoconcave lens is 5/3, the radius of curvature is 0.3 m. The focal length of the lens in air is |
|||||||
a) |
-0.45 m |
b) |
-0.6 m |
c) |
-0.75 m |
d) |
-1.0 m |