# Reflecting telescopes are popular because they’re

easier to build.

These multiple choice questions MCQ – HOTS on Wonders of Light Part 1, test your understanding of the Optics. The concepts being tested are about Mirrors, Laws of Reflection, convergence and divergence, real and virtual images, mirror formula, lens, concave and convex lens, microscope, telescope, human eye, defects like myopia, hypermetropia, presbyopia, etc. HOTS on Wonders of Light Part 1 also prepares you for the competitive exams.

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

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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),
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.

31. Reflecting telescopes are popular because they’re ______ than the refracting telescopes.
(a) more powerful
(b) smaller
(c) easier to build
(d) more durable.

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### Answers to MCQs on Wonders of Light Part 1

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