Question

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is

• A. 10
• B. 20
• C. 50
• D. 25

Answer 1

Answer: (B)

20

Answer 2

$m = m_{o} \times m_{e} \Rightarrow 100 = 5 \times m_{e} \Rightarrow m_{e} = 20$