Question

Match List-I with List-II. The optical instruments are listed in List-I and their lens/mirror types in List-II.

Choose the correct matching of instruments and their uses from the options given below:

• A. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• B. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• C. (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• D. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

Answer 1

The Correct Option is B

Matching of Optical Instruments with the Nature of Lens/Mirror Used:

Optical Instrument	Nature of Lens/Mirror Used	Correct Match
(A) Human eye	(III) Lens of adjustable focal length	A → III
(B) Microscope	(IV) Objective of small aperture and small focal length	B → IV
(C) Reflecting telescope	(I) Concave mirror of large aperture and large focal length	C → I
(D) Refracting telescope	(II) Objective lens of large aperture and large focal length	D → II

Final Matches:

• A → III: The human eye employs a lens with adjustable focal length (the crystalline lens).
• B → IV: A microscope utilizes an objective lens characterized by a small aperture and small focal length to achieve high magnification.
• C → I: A reflecting telescope is equipped with a concave mirror of large aperture and large focal length to enhance light-gathering capability.
• D → II: A refracting telescope incorporates an objective lens with a large aperture and large focal length to improve resolution.