Question

The ratio of effective focal length of Huygens eyepiece and the object distance of its field lens is :

• A. 1 : 1
• B. 2 : 1
• C. 2 : 3
• D. 3 : 1

Answer 1

Answer: (A)

1 : 1

Effective focal length$=3f/2$

Object distance of field lens $=3f/2$

So the ratio $=1:1$