300+ TOP MCQs on Optical Microscope and Answers

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Physics objective questions on air pollution . NEET Physics Optical Microscope Multiple Choice Questions

MCQs on Optical Microscope :

1. What is the ratio of resolving power of an optical microscope for wavelengths λ₁= 4000 Å and λ₂= 6000 Å?
(A) 2:3
(B) 3:2
(C) 6:25
(D) 16:9

Answer

Answer: (B) 3:2

2. Two identical glass (μ_g=3/2) equi – convex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water ((μ_w=4/3). The focal length of the combination is
(A) f/3
(B) f
(C) 4f/3
(D) 3f/4

Answer

Answer: (D) 3f/4

3. The objective and the eye-piece of the compound microscope having a focal length of 0.95 cm and 5 cm, respectively, are kept at a distance of 20 cm. At a distance of 25 cm the large image is formed. Calculate the total magnification.
(A) 84
(B) 80
(C) 94
(D) 75

Answer

Answer: (C) 94

4. A vertical microscope is focused on a point at the bottom of an empty tank. Then water (μ=4/3) is poured into the tank up to a height of 4 cm. After which a liquid that does not mix with water is poured over it up to a height of 2 cm above the water. The refractive index of the liquid is 3/2. What should be the vertical distance through which the microscope must be moved to bring the object in focus again?
(A) 2.61 cm
(B) 1.67 cm
(C) 5 cm
(D) 4.1 cm

Answer

Answer: (B) 1.67 cm

5. Using a microscope a glass plate of 5 mm is viewed from the above. The microscope is lowered by 3 mm to view the bottom surface of the glass. What is the refractive index of the glass?
(A) 2
(B) 1.66
(C) 2.25
(D) 1.4

Answer

Answer: (B) 1.66

6. A microscope is used to focus on an object at the bottom of a beaker. The microscope is raised by 1 cm. To what height should the water be poured to bring the object in focus again. Refractive index of water is 4/3.
(A) 1 cm
(B) 4/3 cm
(C) 4 cm
(D) 3 cm

Answer

Answer: (C) 4 cm

7. Resolving power of a microscope depends upon
(A) The focal length and aperture of the eye lens
(B) The focal length and objective of the eye lens
(C) The apertures of the objective and the eye lens
(D) The wavelength of light illuminating the object

Answer

Answer: (D) The wavelength of light illuminating the object

8. The magnification power of a compound microscope does not depend upon
(A) The focal length and aperture of the eye lens
(B) The apertures of the objective lens
(C) Tube length of the microscope
(D) None of the above

Answer

Answer: (B) The apertures of the objective lens

9. Differentiation capacity of a compound microscope is
(A) 27.5 μm
(B) 2.75 μm
(C) 0.275 μm
(D) None

Answer

Answer: (C) 0.275 μm

10. Resolving power of light microscope is
(A) 2 mm
(B) 0.2 mm
(C) 0.1 mm
(D) 1 mm

Answer

Answer: (B) 0.2 mm