Optics Question 342

Question: If the focal length of objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25 cm away from the objective lens and the final image is formed at infinity. The magnifying power of the microscope is

Options:

A) 150

B) 200

C) 250

D) 400

Show Answer

Answer:

Correct Answer: B

Solution:

m=vouo×Dfe From 1fo=1vo1uo

1(+1.2)=1vo1(1.25)

vo=30 cm

|m| =301.25×253=200



NCERT Chapter Video Solution

Dual Pane