Thin Lenses

1. Give the relationship between magnification and focal length?

Question 1 of 40

2. Mention the 2 methods of determining the focal length of a converging lens?

Question 2 of 40

3. Which of the following is not among the differences between the eye and the camera?

Question 3 of 40

4. Mention the position of the principal focus when rays of light meet a convex lens?

Question 4 of 40

5. Differentiate between a convex and a concave lens

Question 5 of 40

6. Give the application of lenses?

Question 6 of 40

7. The point on the principal axis midway between the lens surface and the principle focus is called?

Question 7 of 40

8. Name the characteristics of images formed by a converging lens when object is between F and lens?

Question 8 of 40

9. Name the characteristics of images formed by a diverging lens?

Question 9 of 40

10. Which of the following statements is TRUE about Lenses?

Question 10 of 40

11. The imaginary lines passing through the center of curvature is called?

Question 11 of 40

12. For a diverging lens the principal focus is?

Question 12 of 40

13. M = (height of image)/(height of object ) =(image distance )/(object distance ) =(v )/(u )

Question 13 of 40

14. Which eye defect is caused by either the eye lens having a long focal length or the eye ball distance being too short?

Question 14 of 40

15. What is the distance between the optical center and the principal focus?

Question 15 of 40

16. What is the plane perpendicular to the principal axis and passing through the principal focus F?

Question 16 of 40

17. A lens can be considered as an assembly of prisms where each prism refracts light?

Question 17 of 40

18. Give the Lens formula for both converging and diverging Lens?

Question 18 of 40

19. What is the name of the rays which are far away from the principal axis?

Question 19 of 40

20. LINEAR MAGNIFICATION M = image distance/ object distance

Question 20 of 40

21. For a converging lens the principal focus is?

Question 21 of 40

22. What does broken lines represent in a ray diagram?

Question 22 of 40

23. Give the SI UNIT of the power of a lens

Question 23 of 40

24. The radius of the sphere of which the surface of the lens is part of is called?

Question 24 of 40

25. The center of the sphere of which the surface of the lens is part of is called?

Question 25 of 40

26. Mention the 2 types of common lenses?

Question 26 of 40

27. Name the characteristics of images formed by a converging lens when the object is beyond 2F?

Question 27 of 40

28. How do you correct short sightedness?

Question 28 of 40

29. What is the ratio of the height of image to the height of object called?

Question 29 of 40

30. The point of convergence or divergence of rays of light is called?

Question 30 of 40

31. Give the 2 impairments in human eye vision due to lens defects?

Question 31 of 40

32. Name the characteristics of images formed by a converging lens when object between F and 2F?

Question 32 of 40

33. Which of the following statements about short sightedness is CORRECT?

Question 33 of 40

34. Name the characteristics of images formed by a converging lens when object is at F?

Question 34 of 40

35. How do you correct long sightedness?

Question 35 of 40

36. The power of lens = (1 )/(focal length in meters ) = 1 / f(m)

Question 36 of 40

37. Explain the working principle of a lens

Question 37 of 40

38. What does full lines represent in a ray diagram?

Question 38 of 40

39. What is the name of the rays which are close and parallel to the principal axis?

Question 39 of 40

40. Which of the following statements about long sightedness is CORRECT?

Question 40 of 40