Question

How does the resolving power of a compound microscope changes when-

• A. Refractive index of medium between the object and the objective lens increases.
• B. Wavelength of radiation used is increased.
• C. Wavelength of radiation used is decreased.
• D. None of these above

Answer 1

Answer: (A), (C)

The correct options are
A Refractive index of medium between the object and the objective lens increases.
C Wavelength of radiation used is decreased.

The resolving power of a compound microscope can be defined as the ability of the microscope to form separate images of two objects placed very close to each other.

• As the R.P is directly proportional to the refractive index (n), it increases when n increases.
• As the R.P is inversely proportional to the wavelength (λ), it decreases when λ increases.

Hence, option $A$ and $C$ are correct.