A) intensity of image is decreased
B) no effect in formation of image
C) any of the above
D) none of the above
Correct Answer: A
Solution :
An optical instrument such as telescope consists of a long cylindrical metallic tube carrying at one end achromatic convex lens of large focal length and large aperture which is called the objective lens. Objective of large aperture is taken so that it may. collect sufficient light and form bright image of very distant objects such as stars etc.
You need to login to perform this action.
You will be redirected in
3 sec
