Four lenses are being considered for use as a microscope objective. Which of the following focal lengths is most suitable?
A
-5mm
B
+5mm
C
-5cm
D
+5cm
Verified Correct Answer: B.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #28464)