Physics Optical Instruments Test 1 Online Mcqs

Maan AliLast Updated: October 13, 2025

Important Optical Instruments Test 1 Question Answer

Total Questions: 20
Time Allowed: 10 Minutes
Total Marks: 20
How to Attempt Test: Please choose the right Option in MCQ-type question.
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Physics Optical Instruments Test 1 Practice Mcqs with Explanation

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Engineering Subject

1. In viewing the distant objects the angle subtended at the telescope is

2. If the focal length of eye piece is 25.0 mm find its magnification

3. Spectrometer using diffraction grating can measure

4. A microscope has an objective lens of 10 mm focal length and an eye piece of 25.0 mm focal length what is the distance between the lenses

5. Telescope is an optical device used for viewing

6. Turn table is the plate form over which we place

7. Spectrometer can measure quite accurately prism

8. The function of collimator is

9. In an astronomical telescope the eye piece has the focal length fee is

10. The image formed after objective lens of an astronomical telescope is

11. If the focal length of objective is 10 mm find its magnification

12. When an image formed by the objective lies at the focus of both the objective and the eye-piece, the telescope is said to be in Final adjustment

13. In an astronomical telescope is the objective has the focal length f₀ is

14. The different parts of spectrometer

15. In normal adjustment, the length of the telescope is

16. Magnifying power of a astronomical telescope in normal adjustment is

17. A simple telescope is consists of

18. A spectrometer is an optical device used to study the spectra from different sources of light which is

19. If the magnification M₁ = 20.0 for objective and M₂ = 12.0 then total magnification is

20. When an image is placed at the focal length of the eye piece, the final image formed at


 

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Maan AliLast Updated: October 13, 2025

Maan Ali

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2 Comments

  1. Please correct these mistakes:

    3. The revolving power of a lens is given by
    (a) R = 1/?min= D/1.22 ?

    7. A compound microscope is consists of an eye piece of focal length
    (a) Large

    Reply

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