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.
Test Helpful For: Physics Test
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Physics Optical Instruments Test 1 Practice Mcqs with Explanation

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Engineering Subject

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

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

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

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

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

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

7. 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

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

9. Spectrometer using diffraction grating can measure

10. 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

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

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

13. The function of collimator is

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

15. A simple telescope is consists of

16. Spectrometer can measure quite accurately prism

17. The different parts of spectrometer

18. Telescope is an optical device used for viewing

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

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


 

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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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