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. Which statement is correct?

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

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

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

6. A magnifying glass forms an enlarged:

7. The focus lies behind the mirror in:

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

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

10. A ray of light perpendicular to the glass slab or along the normal is:

11. The human eye acts like a:

12. The ciliary muscles of the eye control the:

13. Refraction of light is caused by a change in speed, at the interface of two different mediums:

14. They are often used as rear-view mirrors or wing mirrors in vehicles, also called driver mirrors.

15. In a compound microscope, as compared to an objective, the eyepiece lens has a focal length:

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

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

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

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

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