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(B) 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

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greater resolution.

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(B) 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.Since the wavelength $(\lambda)$ is fixed for a given observation,the resolving power is directly proportional to the aperture $(D)$ of the objective lens $(R.P. \propto D)$.Therefore,to achieve greater resolution (the ability to distinguish between two closely spaced objects),telescopes are designed with large aperture objectives.

For a given wavelength,telescopes with large aperture objectives are used for:

Similar Questions

Assertion: The resolving power of a telescope is more if the diameter of the objective lens is more.
Reason: Objective lens of large diameter collects more light.

Resolving power of a telescope increases when

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