12th Class Physics Ray Optics Question Bank MCQs - Ray Optics and Optical Instruments

You are given the following 3 lenses. Two construct an astronomical telescope which one will you used as eyepiece and which one as objective?

Lens Aperture (cm) Power (D)

L1 8 3

L2 1 10

L3 1 6

A) L1, L2

B) L2, L1

C) L2, L3

D) L3, L1

Correct Answer: B

Solution :

Option [b] correct. Explanation: The objective should have large aperture and large focal length while eyepiece should have small aperture and small focal length.

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12th Class Physics Ray Optics Question Bank MCQs - Ray Optics and Optical Instruments

question_answer You are given the following 3 lenses. Two construct an astronomical telescope which one will you used as eyepiece and which one as objective? Lens Aperture (cm) Power (D) L1 8 3 L2 1 10 L3 1 6 A) L1, L2 B) L2, L1 C) L2, L3 D) L3, L1

You are given the following 3 lenses. Two construct an astronomical telescope which one will you used as eyepiece and which one as objective?

Lens Aperture (cm) Power (D)

L1 8 3

L2 1 10

L3 1 6

A) L1, L2

B) L2, L1

C) L2, L3

D) L3, L1