Geometrical Optics – Online MCQs – Physics 10th

1. The long-sightedness can be corrected by using:

2. Lenses form images through:

3. A ray of light incident at an angle to the normal bends towards the normal when it enters into an optically:

4. magnifying glass is also called:

5. Magnification = ?

6. The angle of incidence that causes the refracted ray to bend through 90° is called

7. The focus lies behind the mirror in:

8. A compound microscope uses

9. Power of a lens is defined as the reciprocal of its:

10. The angle of reflection and the angle of reflection are:

11. For a diverging lens the focal length is:

12. The S.I unit of power of a lens is:

13. In a compound microscope, the focal length of the objective lens is:

14. In a telescope, as compared to an eye piece, the objective lens has a focal length:

15. The short-sightedness can be corrected by using:

16. In the photograph enlarger, the object is placed:

17. To illuminate the inaccessible places in the tooth, dentists use:

18. The outer concentric shell of the fibre optics is called:

19. The reciprocal of a lens focal length is called:

20. The size of the image is always smaller than the object in: