# In a compound microscope

JAMB 1980

In a compound microscope

A. there is only one lens

B. the objective lens have a shorter focal length than the eyepiece which is convex

C. the objective lens has a longer focal length than the eyepiece which is convex

D. the objective lens has a shorter focal length than the eyepiece which is concave

E. the objective and the eyepiece are both convex and have the same focal length

Correct Answer: Option B

## Explanation

A compound microscope consists of two convex lenses: an objective lens O of small aperture and an eye piece E of large aperture. The lens which is placed towards the object is called objective lens, while the lens which is towards our eye is called eye piece. These two convex lenses i.e. the objective and the eye piece have short focal length and are fitted at the free ends of two sliding tubes at a suitable distance from each other. Although the focal length of both the objective lens and eye piece is short, but the focal length of the objective lens O is a shorter than that of the eye piece E.

Explain your answer in the comment box below and let’s have a discussion so as to have a great understanding of this question!

GO BACK TO THE PAST QUESTIONS PAGE

If you find this post beneficial, feel free to use the share button to share with friends.

Follow us on our Facebook page and subscribe to this website for more updates by hitting on the bell icon by the bottom left corner of your screen!

About Teezab
His Name is Tiamiyu Abdulbazeet Olawale. He is a student at the University of Ilorin studying Electrical and Electronics Engineering. He likes to give the latest updates about Nigeria and international institutions as he aims at helping people to lay their hands on the right information.