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(B) The resolving power $(RP)$ of a microscope is defined as the ability to distinguish between two closely spaced objects. According to the Rayleigh

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Wavelength of light used,inversely

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(B) The resolving power $(RP)$ of a microscope is defined as the ability to distinguish between two closely spaced objects. According to the Rayleigh criterion,the resolving power is given by the formula: $RP = \frac{1}{\Delta d} = \frac{2n \sin \beta}{1.22 \lambda}$ where $\lambda$ is the wavelength of the light used,$n$ is the refractive index of the medium,and $\beta$ is the semi-vertical angle of the cone of light. From this relation,it is clear that the resolving power is inversely proportional to the wavelength of the light used $(RP \propto \frac{1}{\lambda})$. Therefore,option $B$ is correct.

The resolving power of a microscope depends upon:

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Explain the resolving power of optical instruments and explain the resolving power of telescopes.

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