Doubling the focal length of the objective lens of a compound microscope will change the magnification by what factor?
A) 1/4
B) 1/2
C) 2
D) 4
E)

Question

Doubling the focal length of the objective lens of a compound microscope will change the magnification by what factor?
A) 1/4 
B) 1/2 
C) 2 
D) 4 
E) ​

Quizplus · Accepted Answer

Doubling the focal length of the objective lens will decrease the magnification by half. This is because magnification is directly proportional to the focal length of the objective lens, so if the focal length is doubled, the magnification will be halved (and vice versa). Therefore, the answer is B, 1/2.

Doubling the Focal Length of the Objective Lens of a Compound