ECAT Physics Optical Instruments 1 Test Online

Photo of Maan Ali Maan AliLast Updated: May 5, 2025

Physics Optical Instruments 1 Online Test

ECAT Physics Optical Instruments 1 Chapter Online Test

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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ECAT Physics Optical Instruments 1 Test Online

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Engineering Subject

1. The function of collimator is

2. Telescope is an optical device used for viewing

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

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

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

6. Spectrometer can measure quite accurately prism

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

8. The different parts of spectrometer

9. 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

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

11. A simple telescope is consists of

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

13. Spectrometer using diffraction grating can measure

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

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

16. 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

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

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

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

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


 

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Photo of Maan Ali Maan AliLast Updated: May 5, 2025
Photo of Maan Ali

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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