The focal length of each half, if the symmetrical lens of focal length f cut along AB |
|||||||
(a) |
f |
(b) |
(1/2)f |
(c) |
2f |
(d) |
zero |
The focal length of each half, if the symmetrical lens of focal length f cut along AB |
|||||||
(a) |
f |
(b) |
(1/2)f |
(c) |
2f |
(d) |
zero |