Geometrical Optics – Online MCQs – Physics 10th

1. The inner part ‘core’\ of an optical fibre is coated with another material called “cladding” which has:

2. The ratio of the sine angle of incidence to the sine angle of refraction gives us a constant called the:

3. The inner part of the fibre optics which carries light is called:

4. For a diverging lens the focal length is:

5. A spherical mirror whose inner curved surface is reflecting is called:

6. The focus lies behind the mirror in:

7. Scientists believe that a human with a normal eye and regular vision can see the tiniest objects as small as about 0.1 millimeters,

8. magnifying glass is also called:

9. The convex lens becomes a magnifying glass when:

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

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

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

13. In the normal human eye, the image is formed:

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

15. In a concave mirror, the image size depends upon:

16. In the camera the distance between lens and film is fixed and is equal to:

17. Lenses form images through:

18. Tick the correct mirror equation:

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

20. Concave lens is also called: