An astronomical telescope has a large apertur | vedclass

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(A) The resolving power $(R.P.)$ of a telescope is given by the formula $R.P. = \frac{D}{1.22 \lambda}$,where $D$ is the diameter of the objective len

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have high resolution.

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(A) The resolving power $(R.P.)$ of a telescope is given by the formula $R.P. = \frac{D}{1.22 \lambda}$,where $D$ is the diameter of the objective lens (aperture) and $\lambda$ is the wavelength of light used.Since the wavelength of light from celestial objects is fixed,the only way to increase the resolving power is by increasing the diameter $(D)$ of the objective lens.$A$ larger aperture also allows more light to enter the telescope,making faint objects more visible.Therefore,an astronomical telescope has a large aperture to have high resolution.

An astronomical telescope has a large aperture to

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