Read the following statements related to telescopes carefully:

(A) The main considerations of an astronomical telescope are its light gathering power and its resolution.
(B) the ability to observe two objects (very nearly in the same direction) distinctly depends on the diameter of the objective
(C) large-sized lenses which form images that are free from any kind of chromatic aberration and distortions can be made easily
(D) Telescopes with mirror objectives are free from chromatic aberration

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (2) → (A), (B) and (D) only

Explanation:

(A) Light-gathering power allows telescopes to collect more light from distant faint objects, and resolution determines the ability to see fine details.

(B) The ability to distinguish two closely spaced objects depends on the resolving power, which is proportional to the diameter of the objective lens or mirror; larger diameter gives better resolution.

(C) Manufacturing large lenses free from chromatic and spherical aberration is difficult and expensive, so this statement is false.

(D) Reflecting telescopes use mirrors instead of lenses, so they do not suffer from chromatic aberration because reflection does not disperse light by wavelength.

Correct statements: A, B, D