Geometrical Optics – Online MCQs – Physics 10th

1. Concave lens is also called:

2. A compound microscope uses

3. One of the angles of a right-angled prism is

4. A ray of light bends away from the normal when it enters an optically

5. The angle of incidence that causes the refracted ray in the rarer medium to bend through 90° is called the:

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

7. Which one of these has the largest refractive index?

8. In the optic fiber, the core is made of glass or plastic of relatively:

9. The quantity which does not change during refraction is:

10. For refractive index:

11. An optical fiber comprises:

12. The human eye acts like a:

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

14. When the angle of refraction is 90° and the refractive index for water is 1.33, the critical angle is:

15. The convex lens becomes a magnifying glass when:

16. The nature, position, and size of the image formed by a convex lens depend on the position of the object about point/s:

17. The human eye uses a convex lens system to form a:

18. Magnification = ?

19. To view dim stars, we use:

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