Wonders of Light Part 1

01.

True or False: Concave Mirrors are Diverging Mirrors

02.
The focal length for spherical mirrors is ____ of their radius of curvature
(a) Double
(b) One-Third
(c) Half
(d) Thrice

03.
Fill in the Blank: _____ is a form of electromagnetic radiation that produces the
sensation of vision.

04.
True or False: Virtual Image can be projected on Screen

05.
__________ of Light is used in Solar Devices
(a) Divergence
(b) Refraction
(c) Convergence
(d) Diffraction

06.
Find Odd one out:
Centre of Curvature (C),
Pole (P),
Radius of Curvature (R),
Focus (F)

07.
Image of an Object in a mirror is a ____
(a) Virtual Image
(b) Real Image
(c) Imaginary Image
(d) Projected Image

08.
Fill in the Blank: For a spherical mirror, the nature, position & size of image
depends on __________ of object from mirror surface

09.
Fill in the Blank: A ___________ is a pictorial representation used to trace the
path of ray of light.

10.
True or False: Ray Diagram Rules for Spherical Mirrors: If incident ray is parallel
to Principal axis, then reflected ray passes through Centre of Curvature (C)

11.
For Concave Mirror:
Position of Object: Between P & F
Position of Image: Behind Mirror
Size of Image: Magnified
Nature of Image: ___________
(a) Real and Upright
(b) Virtual and Inverted
(c) Real and Inverted
(d) Virtual and Upright

12.
True or False: Sign Convention for Spherical Mirror:
Distances measured perpendicular to and above the principal axis are taken as Negative

13.
True or False: Sign Convention for Spherical Mirror:
The object is always placed on the left of the mirror

14.
Magnification of a spherical mirror is {Height of Image} _____ {Height of Object}
(a) Plus
(b) Divided by
(c) Multiplied by
(d) Minus

15.
True or False: Ray Diagram Rules for Spherical Mirrors: If incident ray passes through
focus then reflected ray is parallel to principle axis

16.
True or False: Sign Convention for Spherical Mirror:
Focal length of convex mirror is positive while that of concave mirror is negative

17.
True or False: Sign Convention for Lens:
Focal length of convex lens is Positive

18.
For Concave Mirror:
Position of Object: At Focus (F)
Position of Image: At Infinity
Size of Image: Highly Magnified
Nature of Image: ___________
(a) Real and Upright
(b) Virtual and Inverted
(c) Real and Inverted
(d) Virtual and Upright

19.
Fill in the Blank: The degree of convergence of light rays achieved by convex lens
is expressed in terms of _______.

20.
True or False: Convex Mirrors are Diverging Mirrors

21.
True or False: Ray Diagram Rules for Spherical Mirrors:
If incident ray passes through Centre (C), then reflected ray passes through Focus
(F)

22.
For concave mirror:
Position of Object: At infinity
Position of Image: At Focus (F)
Size of Image: Highly diminished
Nature of Image: ___________
(a) Real and Upright
(b) Virtual and Inverted
(c) Real and Inverted
(d) Virtual and Upright

23.
Fill in the Blank: Unit of power of lens is _____

24.
Fill in the Blank: Sign Convention for Spherical Mirror:
All distances parallel to principal axis are measured from the _____ of the mirror

25.
Name the following: The tendency of pupil to adjust the opening to regulate the
amount of light entering the eye.

26.
Find Odd one out:
Pupil
Iris
Retina
Myopia

27.
For Concave Mirror:
Position of Object: At Centre (C)
Position of Image: At Centre (C)
Size of Image: Same Size
Nature of Image: ___________
(a) Real and Upright
(b) Virtual and Inverted
(c) Real and Inverted
(d) Virtual and Upright

28.
Name the following: The defect in human eye, when one is unable to see distant objects
clearly. Image of distant object is formed in front of retina.

29.
True or False: 1 Dioptre is the power of lens whose focal length is 1 metre.

30.
Name the following: The process of focusing the eye at different distances.

Answers:

01. False { They are Converging mirrors }
02. (c) Half
03. Light
04. False
05. (c) Convergence
06. Radius of Curvature (R) { Rest are all points }
07. (a) Virtual Image
08. distance
09. Ray Diagram
10. False { the reflected ray passes through focus (F) }
11. (d) Virtual and Upright
12. False { it is Positive }
13. True
14. (b) Divided by
15. True
16. True
17. True
18. (c) Real and Inverted
19. power of lens
20. True
21. False { the reflected ray passes through Centre (C) }
22. (c) Real and Inverted
23. Dioptre
24. Pole
25. Adaptation
26. Myopia { Rest all are parts of eye }
27. (c) Real and Inverted
28. Myopia
29. True
30. Accommodation