Resolving Power of Telescope and Eyepiece Function – Rankers Physics

Miscellaneous: Practice Problem & Solution

Assertion (A): The stars which are not resolved in the image produced by the objective of a telescope can't be further resolved by its eye piece. Reason (R): The primary purpose of eyepiece of telescope is to provide the magnification of image produced by the objective.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Miscellaneous. Understanding the underlying formula is key to arriving at the correct answer below:

The resolving power of a telescope is determined by the objective lens's diameter. The eyepiece's function is to magnify the image formed by the objective, not to enhance its resolution. Thus, details not resolved by the objective cannot be resolved by the eyepiece. Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.

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