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(C) The resolving power $(RP)$ of a compound microscope is given by the formula: $RP = \frac{2n \sin \beta}{1.22 \lambda}$, where $n$ is the refractiv

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increase the refractive index of the medium between the object and objective lens.

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(C) The resolving power $(RP)$ of a compound microscope is given by the formula: $RP = \frac{2n \sin \beta}{1.22 \lambda}$, where $n$ is the refractive index of the medium between the object and the objective lens, $\beta$ is the semi-vertical angle of the cone of light from the object, and $\lambda$ is the wavelength of light used.From the formula, it is clear that $RP$ is directly proportional to the refractive index $(n)$.Therefore, increasing the refractive index of the medium between the object and the objective lens improves the resolving power of the microscope.

To improve the resolving power of a compound microscope, we should:

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