Quiz  /  MCQ On Optical Microscope

  • 1. 
    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.

  • 2:3
  • 3:2
  • 6:25
  • 16:9

  • 2. 
    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?

  • f/3
  • f
  • 4f/3
  • 3f/4

  • 3. 
    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?

  • 84
  • 80
  • 94
  • 75

  • 4. 
    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.

  • 2.61 cm
  • 1.67 cm
  • 5 cm
  • 4.1 cm

  • 5. 
    Resolving power of a microscope depends upon

  • 2
  • 1.66
  • 2.25
  • 1.4

  • 6. 
    The magnification power of a compound microscope does not depend upon

  • 1 cm
  • 4/3 cm
  • 4 cm
  • 3 cm

  • 7. 
    Differentiation capacity of a compound microscope is

  • The focal length and aperture of the eye lens
  • The focal length and objective of the eye lens
  • The apertures of the objective and the eye lens
  • The wavelength of light illuminating the object

  • 8. 
    Resolving power of light microscope is

  • The focal length and aperture of the eye lens
  • The apertures of the objective lens
  • Tube length of the microscope
  • None of the above
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