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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments2 Marks
Question
Define resolving power of a compound microscope. How does the resolving power of a compound microscope change when.
  1. refractive index of the medium between the object and objective lens increases?
  2. wavelength of the radiation used is increased?
✓

Answer

R.P. of microscope is reciprocal of the minimum separation of two near points, seen as distinct.

or

R.P. of microscope is reciprocal of the smallest distance between two point object, which are just resolved by the microscope.

  1. increases, (with increase of $\mu$) 
  2. decreases, (with increase of $\lambda$).

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