Physics - Geometrical Optics Question with Solution | TestHub

The resolving power of a telescope is given by the formula $R=\frac{D}{1.22\lambda }$, where $D$ is the diameter (aperture) of the objective lens and $\lambda$ is the wavelength of light.

From this relation, it is clear that the resolving power is directly proportional to the aperture of the objective lens. Therefore, for a given wavelength, an objective with a large aperture is used to achieve greater resolution.

Additionally, a larger aperture collects more light, which helps in observing faint astronomical objects, but among the given choices, greater resolution is the primary optical advantage.

Answer: greater resolution.