Q 1 – A smooth shining surface, which rebounds the light back in the same or in a different direction, is called
(a) a mirror
(b) a lens
(c) reflection of light
(d) point of incidence
Q 2 – Beam of light striking the reflecting surface is called
(a) reflecting ray
(b) incident ray
(c) refracted ray
(d) normal ray
Q 3 – Band of seven colors is called
(a) VIBGYOR
(b) spectrum
(c) dispersion
(d) reflection
Q 4 – The front bulged part of the eyeball is called
(a) cornea
(b) choroid
(c) pupil
(d) retina
Q 5 – Which one of the following statements is correct regarding rods and cones in the human eye?
(a) Cones are sensitive to dim light
(b) Cones are sensitive to bright light
(c) Rods are sensitive to bright light
(d) Rods can sense colour
Q 6 – In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as
(a) i = r
(b) i < r
(c) i > r
(d) no definite relation
Q 7 – Visually impaired people can read and write using
(a) electronic writer
(b) digital pens
(c) braille system
(d) hearing aids
Q 8 – The image formed by a camera and a simple microscope are respectively
(a) real and real
(b) real and virtual
(c) virtual and virtual
(d) virtual and real
Q 9 – What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
(a) 60°
(b) 45°
(c) 90°
(d) 180°
Q 10 – The splitting of white light into its seven constituent colors is called
(a) refraction
(b) dispersion
(c) deviation
(d) reflection
Q 11 – The defect due to which a person is not able to see the distant objects clearly:
(a) Myopia
(b) Hypermetropia
(c) Cornea
(d) Cataract
Q 12 – The amount of light entering the eye is controlled by
(a) eye lens
(b) cornea
(c) iris
(d) ciliary muscle
Q 13 – Myopia can be corrected by using a
(a) concave lens
(b) convex lens
(c) opaque lens
(d) microlens
Q 14 – Light enters the eye through
(a) eye lens
(b) pupil
(c) cornea
(d) retina
Q 15 – If the angle of incidence of light falling on a plane mirror is 30°, what will be the angle of reflection?
(a) 90°
(b) 60°
(c) 30°
(d) 0°
Q 16 – When we stand in front of our dressing table, our left hand seems to be right and our right seems to be left. This is called
(a) Left-right confusion
(b) Lateral inversion
(c) Up -side down phenomenon
(d) mirage
Q 17 – Light passing through a prism splits into seven colors. This is called
(a) Dispersion
(b) Dissolution
(c) Division
(d) None of the above
Q 18 – Rainbow is a natural phenomenon showing
(a) Reflection
(b) Deflection
(c) Dispersion
(d) Diversion
Q 19 – In the retina of the eye, the area having no sensory cells is called
(a) iris
(b) Blindspot
(c) cornea
(d) Dark spot
Q 20 – light falls perpendicularly on a plane mirror, what will be the angle at which it will be reflected?
(a) 45°
(b) 90°
(c) 180°
(d) 360°
Q 21 – Which of the following is not a luminous object?
(a) sun
(b) candle
(c) moon
(d) Tube light
Q 22 – To make a kaleidoscope we require
(a) Three plane mirrors
(b) Four plane mirrors
(c) Three glass sheets
(d) Four glass sheets
Q 23 – In our eye _______ cells can sense colour
(a) Rod
(b) Cone
(c) Both rod and cone
(d) Neither rod nor cone
Q 24 – An owl can see clearly at night but not day time because it has
(a) More rods and few cones
(b) Less rod and more cones
(c) More rods and more cone
(d) Fewer rods and fewer cones
Q 25 – Match the following items given in Column A with that in Column ‘B’:
| Column A | Column B |
| (i) Cornea | (a) Transparent front part of the eye |
| (ii) Pupil | (b) Layer on which impression of images is formed |
| (iii) Iris | (c) Point on retina where there are no nerve endings |
| (iv) Retina | (d) Sensitive for bright light |
| (v) Blindspot | (e) Is a small opening in the cornea |
| (vi) Rods | (f) Sensitive for dim light |
| (vii) Cones | (g) Controls the size of the pupil |
Q 26 – We are able to see an object due to the presence of
(a) light
(b) dark
(c) refraction
(d) object
Q 27 – The bouncing back of light into the same medium is called
(a) refraction
(b) reflection
(c) dispersion
(d) diffraction
Q 28 – A mirror has _____ surface.
(a) rough
(b) polished
(c) dark
(d) all of these
Q 29 – Maximum part of the light is reflected by
(a) opaque object
(b) translucent object
(c) transparent object
(d) all of these
Q 30 – The backside of a plane mirror contains
(a) gold coating
(b) silver coating
(c) aluminum coating
(d) copper coating
Q 31 – The perpendicular drawn to the reflecting surface is called
(a) normal
(b) incident ray
(c) reflected ray
(d) none of these
Q 32 – There are ________ laws of reflection.
(a) one
(b) two
(c) three
(d) four
Q 33 – The angle of incidence is always _______ to the angle of reflection.
(a) greater
(b) smaller
(c) equal
(d) none of these
Q 34 – The angle between the reflected ray and the normal is called
(a) angle of incidence
(b) reflected ray
(c) angle of reflection
(d) point of incidence
Q 35 – The reflection of light from a smooth surface is called
(a) diffused reflection
(b) regular reflection
(c) dispersion
(d) spectrum
Q 36 – Which of the following results in the diffused reflection?
(a) Plane mirror
(b) Shiny surface
(c) Silver
(d) Wood
Q 37 – The nature of the image formed by a plane mirror is
(a) real and inverted
(b) virtual and erect
(c) real and erect
(d) virtual and inverted
Q 38 – If you hold a pen in your right hand and stand in front of the mirror, the pen will be in the left hand in the image. This phenomenon is called
(a) lateral inversion
(b) diffraction
(c) reflection
(d) inversion
Q 39 – If two plane mirrors are inclined at an angle of 40°, the number of images formed will be
(a) 7
(b) 8
(c) 9
(d) 5
Q 40 – Type of mirror used as side view mirror is
(a) convex mirror
(b) plane mirror
(c) concave mirror
(d) ground mirror
Q 41 – The front bulged part of the eyeball is called
(a) cornea
(b) iris
(c) retina
(d) pupil
Q 42 – Two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
(a) 25°
(b) 50°
(c) 65°
(d) 115°
Q 43 – A toy is placed at 10 cm in front of a plane mirror. What is the distance of the image from the mirror?
(a) 20 cm
(b) 40 cm
(c) 10 cm
(d) 30 cm
Q 44 – A candle is 30 cm high. What is the height of its image in a plane mirror?
(a) 10 cm
(b) 15 cm
(c) 30 cm
(d) 45 cm
Q 45 – Visually challenged people can read and write with
(a) hearing aid
(b) electronic typewriter
(c) Braille system
(d) digital pen
Q 46 – The human eye can clearly see up to which distance?
(a) Infinity
(b) 1000 km
(c) 100 km
(d) 10 km
Q 47 – The human eye cannot see clearly at a distance that is less than
(a) 2.5 cm
(b) 25 cm
(c) 15 cm
(d) 1.5 cm
Q 48 – The angle between the incident ray and the normal is called the angle of
(a) reflection
(b) refraction
(c) transmission
(d) incidence
Q 49 – Which of the following parts of an eye controls the amount of light entering the eye by contracting or dilating?
(a) Retina
(b) Cornea
(c) Pupil
(d) Iris
Q 50 – The phenomenon of breaking up white light into its seven constituent colors is called
(a) reflection of light
(b) refraction of light
(c) dispersion of light
(d) radiation of light
Q 51 – We can see ourselves in a mirror or a polished surface but not on walls because of
(a) regular reflection
(b) normal reflection
(c) irregular reflection
(d) specular reflection
Q 52 – How many cells are there in a Braille character?
(a) 12
(b) 9
(c) 3
(d) 6
Q 53 – Which of the following will produce a regular reflection?
(a) Tree leaf
(b) Wood
(c) Wall
(d) Mirror
Q 54 – An instrument that enables us to see things that are too small to be seen with the naked eye is called
(a) microscope
(b) periscope
(c) kaleidoscope
(d) none of these
Q 55 – The property of a plane mirror to make ‘right appear as left’ and vice versa, is called
(a) vertical inversion
(b) lateral inversion
(c) reflection
(d) refraction
Q 56 – Fill in the blanks with suitable word/s
- Light is a form of __________
2. The ray of light that strikes the reflecting surface is called __________ ray.
3. The bouncing back of light after it falls on a surface is called __________
4. A mirror has _________ and _________ surface.
5. __________ is the perpendicular line on the incidence point.
6. A plane mirror forms a _________ image.
7. The ray which returns after striking the surface is called __________ ray.
8. Angle of incidence is always __________ to the angle of reflection.
9. Reflection from a smooth surface is called __________ reflection.
10. The size of the image formed by the plane mirror is __________ as the size of the object.
11. Splitting of light into seven colours is called __________
12. Kaleidoscope is based on the concepts of __________
13. The point on the surface at which incident ray strikes is called __________
14. The reflection of light from an uneven surface is called __________
15. Paper is a _________ surface.
16. When the mirrors are inclined at 900, we get images.
17. In bright light, the size of pupil __________
18. The space between the cornea and lens is filled with a liquid called __________
19. Braille system was invented by __________
20. The image formed by a plane mirror is ………………….. inverted.
21. The angle of incidence is always equal to the angle of …………………..
22. ………………….. formation is the natural phenomenon showing dispersion.
23. The lens of the eye focuses light on …………………..
24. The size of the pupil becomes ………………….. when we see in dim light.
Q 57 – True or False
- Deficiency of vitamin B causes night blindness. False
- In the Braille system, patterns are made with coloured dots. False
- Normal make 60° angle with the reflecting surface. False
- Angle of incidence is always equal to angle of reflection. True
- Diffused reflection occurs due to rough surface. True
- Kaleidoscope is based on the principle of dispersion of light. False
- Both incident ray and reflected ray lie in the same plane. True
- The choroid prevents the internal reflection of light and protects the light sensitive inner parts of the eye. True
- Rainbow forms due to dispersion. True
- Rods are sensitive to bright light. False
- The iris is the coloured part of the eye. True
- Diffused reflection is due to the failure of laws of reflection. False
- Ciliary muscles changes the shape of the lens in the eye. True
- We should not wash our eyes. False
- Braille was designed by Louis Braille. True
16. Cones are sensitive to dark light. False
17. Too much light is good for the eyes. False
18. The size of the pupil becomes large when we see it in dim light. True
19. The angle of incidence is not equal to the angle of reflection in irregular reflection. False
20. The angle between the normal and the incident rays is called the angle of incidence. True
Q 58 – Match the following
| Column I | Column II |
| 1. Reflection | (a) Regular reflection |
| 2. Normal vision | (b) bouncing back of the light |
| 3. Smooth surface | (c) 25 cm |
| 4. Kaleidoscope | (d) Short-sightedness |
| 5. Hypermetropia | (e) Dispersion of light |
| 6. Cornea | (f) For a visually challenged person |
| 7. Rainbow | (g) Multiple images |
| 8. Blindspot | (h) Front part of the eye |
| 9. Braille system | (i) Sensitive for bright light |
| 10. Rods | (j) Long-sightedness |
| 11. Cones | (k) Sensitive for dim light |
| 12. Myopia | (l) No sensory nerves |
| 13. Retina | (m) Cataract |
| 14. Cloudy lens | (n) Ability to focus |
| 15. Accommodation power | (o) Image formed |
Q 59 – What makes objects visible?
(a) The absorption of light by objects
(b) The reflected light from the object
(c) The total internal reflection taking place in an object
(d) The refracted light from the object
Q 60 – If the angle of incidence is 50°, then calculate the angle between the incident ray and the reflected ray.
(a) 50°
(b) 100°
(c) 130°
(d) 80°
Q 61 – ________ refers to collection of rays.
(a) Photon
(b) Beam
(c) Shadow
(d) Image
Q 62 – Which of the following travels faster?
(a) Jet Airplane
(b) Sound
(c) Light
(d) Supersonic plane
Q 63 – What makes the object visible?
(a) Size
(b) Time
(c) Colour
(d) Light
Q 64 – An example of a luminous object is
(a) Star
(b) Smooth surface
(c) Mirror
(d) Cloth
Q 65 – With what is glass coated in order to convert it into a mirror?
(a) Silver
(b) Copper
(c) Aluminium
(d) Platinum
Q 66 – How many images are obtained when plane mirrors are arranged parallel to each other?
(a) A single image
(b) Two images
(c) Infinite number of images
(d) Zero image
Q 67 – Angle of incidence is always
(a) Equal to the angle of reflection
(b) Equal to the angle of refraction
(c) More than the angle of reflection
(d) Less than the angle of reflection
Q 68 – Which of the following is used by E.N.T. doctors?
(a) Convex mirror
(b) Convex lens
(c) Plane mirror
(d) Concave mirror
Q 69 – What is the phenomenon of light bouncing back into the same medium called?
(a) Reflection
(b) Refraction
(c) Dispersion
(d) Splitting
Q 70 – What is the nature of the image formed on the retina of the human eye of an object?
(a) Virtual and erect
(b) Virtual and inverted
(c) Real and erect
(d) Real and inverted
Q 71 – Convex lens focus a real, point sized image at focus, the object is placed
(a) At the focus
(b) Between F and 2F
(c) At infinity
(d) At 2F
Q 72 – Braille system is used by
(a) Hearing impaired
(b) Black people
(c) Blind people
(d) African people
Q 73 – Speed of light is fastest in
(a) Air
(b) Water
(c) Diamond
(d) Glass
Q 74 – Splitting of white rays of light into seven colors is called
(a) Dispersion of light
(b) Reflection of light
(c) Refraction of light
(d) Scattering of light
Q 75 – A number of rays from different directions assemble at a point are called
(a) Intersecting rays
(b) Parallel rays
(c) Divergent rays
(d) Convergent rays
Q 76 – What is the name of the object through which light can pass?
(a) Opaque
(b) Translucent
(c) Transparent
(d) Luminous
Q 77 – From a source light travels as rays that are
(a) Divergent
(b) Convergent
(c) Parallel
(d) Diffused
Q 78 – What happens in a lateral inversion?
(a) The right side of the object will be on the right side of the image.
(b) The left side of the object will be on the left side of the image.
(c) The top of the object will be the bottom of the object.
(d) The right side of the object will be on the left side of the image.
Q 79 – The angle of reflection is equal to the angle of incidence
(a) Sometimes
(b) Always
(c) Never
(d) Under special case