The telescopes, for a given wavelength, the objectives with large aperture are used for
The telescopes, for a given wavelength, the objectives with large aperture are used for
greater magnification.
greater resolution.
reducing lens aberration.
ease of manufacture.
Solution
According to mathematical equation R.P. $\propto \frac{1}{\lambda}$, telescopes being used in sunlight to observe celestial objects, practically there is no control on wavelength incident $(\lambda)$. Hence, using objective lens of large aperture is effective way to increase R.P. of telescope.