| What is the essential difference between a terrestrial telescope and an astronomical telescope? |
| (a)One of the lenses in a terrestrial telescope is concave |
| (b)the final image formed in a terrestrial telescope is virtual |
(c)A terrestrial telescope forms an erect image while an astronomical telescope forms an inverted image  |
| (d)A terrestrial telescope forms an inverted image while an astronomical telescope forms an erect image |
