Class 6th Science MCQ
Chapter 11 Light, Shadows And Reflections
Q1. Out of these, which one is not a man-made luminous body?
1. Electric bulb.
2. Burning candle.
3. Firefly (Jugnu).
4. Oil lamp.
Ans: 4. Oil lamp.
Explanation: Firefly (Jugnu) is a natural luminous body.
Q2. Which types of objects do not allow light to pass through them?
1. Translucent.
2. Opaque.
3. Transparent.
4. Penumbra.
Ans: 2. Opaque.
Explanation: Opaque objects do not allow the light to pass through them while translucent objects allow only a part of light to pass
through them.
Q3. ____________ eclipse occurs when moon comes between sun and earth.
1. Lunar.
2. Solar.
3. Partial lunar.
4. Earth.
5. None of these.
Ans: 2. Solar.
Q4. A glass sheet is given to you. By which of the following methods, it can be converted into an opaque object
without breaking?
1. Combining another same glass sheet with the given glass sheet.
2. Covering glass sheet with thin polyethene bag.
3. Applying black paint on both sides of it.
4. All the above.
5. None of these.
Ans: 3. Applying black paint on both sides of it.
Q5. Name the phenomenon due to which our right ear appears as left ear when we see our face in the mirror.
1. Reflection.
2. Lateral inversion.
3. Eclipse.
4. Refraction.
5. None of these.
Ans: 2. Lateral inversion.
Q6. Which of the following is used as a rear view mirror in vehicles?
1. Concave mirror.
2. Convex mirror.
3. Converging mirror.
4. Plane mirror.
5. None of these.
Ans: 2. Convex mirror.
Q7. A solid transparent sphere has a small opaque dot at its centre. When observed from outside, the apparent
position of the dot will be:
1. Closer to the eye than its actual position.
2. The same as its actual position.
3. Farther away from the eye than its actual position.
4. None of these.
Ans: 2. The same as its actual position.
Explanation:
Q8. Paheli observed the shadow of a tree at 8:00 a.m., 12:00 noon and 3:00 p.m. Which of the following statements is
closest to her observation about the shape and size of the shadow?
1. The shape of the shadow of the tree changes but the size remains the same.
2. The size of the shadow of the tree changes but the shape remains the same.
3. Both the size and shape of the shadow of the tree change.
4. Neither the shape nor the size of the shadow changes.
Ans: 3. Both the size and shape of the shadow of the tree changes.
Explanation:
Both the size and shape of the shadow of the tree will be changed because at 8:00 am and 3:00 pm, the lengths of the shadows of
tree will be longer than its actual length and point to the West and the East directions, respectively. However, at 12:00 noon, the sun
will be high in the sky just above the tree, so the shadow of tree will be short.
Q9. There is no dark shadow formed by the glass when light is shone on it. This is because:
1. It is not night time yet.
2. The light is not strong enough.
3. The glass is a transparent object.
4. The distance between glass and screen is very large.
Ans: 3. The glass is a transparent object.
Explanation:
The shadows are formed when the opaque object cuts off the light from the source. Since glass is transparent, it allows the light to
pass through it. So no dark shadow is formed.
Q10. Riya and Priya were sitting around a round table. They noticed that they could see their own and each other’s
image onto the table top. Then table top is made of:
1. Unpolished wood, covered with white cloth.
2. Polished glass of red colour.
3. Glass covered with cellophane paper.
4. Smoked glass covered with green colour cloth.
Ans: 2. Polished glass of red colour.
Explanation:
Polished glass of red colour reflects some of the light incident on it so images of the both persons are formed on it.
Q11. Shape of a shadow depends on the:
1. Colour of the opaque object.
2. Shape of the screen.
3. Shape of an opaque object.
4. Colour of the screen.
5. None of these.
Ans: 3. Shape of an opaque object.
The given figure is showing:
1. Diverging mirror.
2. Converging mirror.
3. Converging lens.
4. Diverging lens.
5. None of these.
Ans: 2. Converging mirror.
Q13. Which letters of English alphabet will not show lateral inversion?
1. I, O, U.
2. N, Z, X.
3. I, X, E.
4. A, E, I.
Ans: 1. I, O, U.
Explanation: I, O, U will not show lateral inversion.
Q14. Two students while sitting across a table looked down on to its top surface. They noticed that they could see their
own and each other’s image. The table top is likely to be made of:
1. Unpolished wood.
2. Red stone.
3. Glass sheet.
4. Wood top covered with cloth.
Ans: 3. Glass sheet.
Explanation:
The table top must be made of glass sheet because only a glass sheet can show the images of both the students, which can be seen
by both of them.
Q15. Nisha placed a stick in the playground at 8:15 am in the morning. How will the shadow of the stick at 12:00 noon
be in comparison to the one at 8:15 am?
1. It will be shorter than one at 8:15 am.
2. It will be same as one at 8:15 am.
3. It will be greater than one at 8:15 am.
4. Shadow will not form at 12:00 noon.
Ans: 1. It will be shorter than one at 8:15 am.
Explanation:
Shadow formed is larger in the morning and evening as compare to the shadow at noon because at noon the sun is at top of the stick.
Q16. Air and water are:
1. Transparent and non luminous.
2. Opaque and non luminous.
3. Translucent and non luminous.
Ans: 1. Transparent and non luminous.
Q17. We place an object X in between a reflecting surface and a screen Q, on which an image of X is formed. If a clear
image of object X is formed on the screen Q, then which of the following properties is true for object X?
1. Transparent.
2. Translucent.
3. Opaque.
4. All the above.
5. None of these.
Ans: 3. Opaque.
Q18. Which of the following is/ are not always necessary to observe a shadow?
1. Sun.
2. Screen.
3. Source of light.
4. Opaque object.
Ans: 1. sun.
Explanation:
Sun is not always necessary to observe a shadow because any source of light, an opaque object and a screen are just necessary
enough to see a shadow.
Q19. Which of the following images are real?
1. Image formed on the screen of cinema hall.
2. Image formed by a pinhole camera.
3. Image formed by a concave mirror when object is placed at infinity.
4. All the above.
5. None of these.
Ans: 4. All the above.
Q20. Study the set- up below.
Q22. An incident ray falling normally on a plane mirror then angle of incidence is:
1. 0o
2. 120o
3. 90o
4. 60o
5. None of these.
Ans: 1. 0o
Q23. What is lateral inversion?
1. Image becomes inverted.
2. Image bends laterally.
3. Right of the object appears left of the image.
4. All of these happen.
Ans: 3. Right of the object appears left of the image.
Explanation: Right side of the object appears as left side in the image formed by a plane mirror.
Q24. In which of the following medium speed of light is maximum?
1. In air.
2. In vacuum.
3. In glass.
4. In water.
5. None of these.
Ans: 2. In vacuum.
Q25. Look at the following figure and find out the angle of reflection.
1. 30o
2. 45o
3. 90o
4. 60o
5. None of these.
Ans: 2. 45o
Q26. Speed of light in vacuum is:
1. 3 × 10 km/ h
2. 3 × 10 m/ s
3. 3 × 10 m/ h
4. 3 × 10 m/ s
5. None of these.
Ans: 2. 3 × 10 m/ s
Q27. Fill in the blanks with most appropriate option.
Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the
earth. This is due to the reason that the ______(i)______, the region of complete _______(ii)_______ is not able
to reach the earth. The region of partial _______(iii)______, that is the ______(iv)______ reaching the earth is
too large and too faint to be visible to us.
1. (i) Penumbra (ii) Darkness (iii) Brightness (iv) Umbra.
2. (i) Penumbra (ii) Brightness (iii) Darkness (iv) Umbra.
3. (i) Umbra (ii) Darkness (iii)Brightness (iv) Penumbra.
4. (i) Umbra (ii) Brightness (iii) Darkness (iv) Penumbra.
Ans: 3. (i) Umbra (ii) Darkness (iii)Brightness (iv) Penumbra.
Explanation:
(i) Umbra (ii) Darkness (iii)Brightness (iv) Penumbra.
Q28. Which of the following is a man-made source of light?
1. Sun.
2. Meteor.
3. Tube-light.
4. Star.
5. None of these.
Ans: 3. Tube-light.
Q29. Wool is which type of medium?
1. Transparent.
2. Translucent.
3. Opaque.
4. Optical.
5. None of these.
Ans: 3. Opaque.
Q30. A transparent object which is mostly used in windows of houses.
1. Polythene.
2. Wood.
3. Glass.
4. Ground glass.
5. All of these.
Ans: 2. Wood.
Q31. Which of the following is a characteristic of the image formed by plane mirror?
1. Erect.
2. Virtual.
3. Same size as object.
4. All the above.
5. None of these.
Ans: 4. All the above.
Q32. Geeta placed three objects made of different materials as shown in the figure. She observed a bright spot of light
at (II) but (III) would not get any spot.-Then,
1. (I) and (II) are made of transparent materials and (III) is made of opaque material.
2. (I) is made of transparent material, (II) is made of translucent material and (III) is made of opaque material.
3. (I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or
opaque or translucent material.
4. (I) and (II) are made of opaque material and (III) is made of transparent material.
Ans: 3. (I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or opaque or translucent
material.
Explanation:
Transparent material allows light to pass through it and opaque object obstructs it.
Q33. You are standing upright in a room in front of a vertical mirror. In this mirror, you can see from your position, only
the upper two- third part of your body. You wish to see the full image of your body in the mirror. Which
combination of the following three courses of action will achieve this?
1. Move away from the mirror.
2. Move towards the mirror.
3. Use a mirror whose height will allow you to see your full image.
1. I only.
2. II only.
3. III only.
4. Either I or III.
Ans: 3. III only.
Explanation:
To see the entire length of your body reflected in the mirror, you should use a mirror whose height will allow you to see your full
image.
Q34. Rahul and Ravi are standing on the opposite sides of a closed door, both of them are able to see each other
clearly. Which type of substance is used to make this door?
1. Transparent.
2. Translucent.
3. Opaque.
4. All the above.
5. None of these.
Ans: 1. Transparent.
Q35. Which is an example of a translucent object?
1. A thin sheet of paper.
2. A thin glass slab.
3. A thin iron sheet.
4. All of these.
Ans: 1. A thin sheet of paper.
Explanation: A thin sheet of paper is transparent.
Q36. Observe the picture given in Fig. carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A
to get this patch of light?
1. A wooden board.
2. A glass sheet.
3. A mirror.
4. A sheet of white paper.
Ans: 3. A mirror.
Explanation:
A mirror is kept at position A to get a patch of light because only a mirror can change the direction of light that falls on it, i.e. causes
reflection.
Q37. Which of the following is not a source of light?
1. Star.
2. Burning candle.
3. Lantern.
4. Torch.
5. None of these.
Ans: 5. None of these.
Q38. Lunar eclipse occurs on ___________ day.
1. Partial moon.
2. Full moon.
3. New moon.
4. Crescent moon.
5. None of these.
Ans: 2. Full moon.
Q39. A very narrow beam of light is called:
1. Ray.
2. Beam.
3. Candela.
4. All the above.
5. None of these.
Ans: 1. Ray.
Q40. Which one of the following types of energy is required to see any non-luminous object?
1. Light energy.
2. Heat energy.
3. Sound energy.
4. Wind energy.
5. None of these.
Ans: 1. Light energy.
Q41. Which of the following is a characteristic of virtual image?
1. It can be obtained on a screen.
2. It is always inverted.
3. It is always formed in front of the mirror.
4. It is always erect.
5. None of these.
Ans: 4. It is always erect.
Q42. When an opaque object comes in the path of light it forms
1. An image with colours.
2. Shadow.
3. Black and white image.
4. Depends on the colour of the light.
Ans: 2. Shadow.
Explanation: A shadow is formed when an opaque object comes in the way of light.
Q43. Images of actors on screen in cinema halls are;
1. Virtual image.
2. Real images.
3. Imaginary images.
4. All the above.
5. None of these.
Ans: 1. Virtual image.
Q44. In a periscope two plane mirrors are fitted at its two ends in such a way that:
1. They intersect each other.
2. They are parallel to one another.
3. They make an angle of 90 with each other.
4. They make an angle of 30 with each other.
5. None of these.
Ans: 2. They are parallel to one another.
Q45. Which of the following explains why air is not visible?
1. It is nearly a perfect transparent substance.
2. It neither absorbs nor reflects light.
3. It transmits whole of light.
4. All of these.
Ans: 2. It neither absorbs nor reflects light.
Explanation:
An object is visible, when it either absorbs light or reflects light. Air is not visible because it neither absorbs nor reflects light.
Which of the items above will allow you to see around a corrner from where you are stending?
1. (i) only.
2. (iii) only.
3. (i) and (ii).
4. (i) and (iii).
Ans: 2. (iii) only.
Explanation:
Figure (iii) is periscope which is used to see around the corners. It is based upon the principle of rectilinear propagation of light and
reflection of light.
Q47. Read the given statements and select the correct option,
Statement 1: Rahul placed a colored plastic bottle in front of the beam of a torch light. Then he placed a
transparent sheet of same size on the other side of bottle. No shadow will form on the screen.
Statement 2: Translucent objects allow light to pass through them partially.
1. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
2. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
3. Statement 1 is true but statement 2 is false.
4. Statement 1 is false but statement 2 is true.
Ans: 4. Statement 1 is false but statement 2 is true.
Explanation:
A colored plastic bottle is an opaque material. When a light beam is incident on it, a shadow will form on the screen can easily pass
through the transparent material.
Q48. Letter E is placed in front of plane mirror, how would its image look like and also name the phenomenon involved
in this.
1. E, Reflection.
2. Lateral inversion.
3. E, Lateral inversion.
4. Refraction.
5. None of these.
Ans: 2. Lateral inversion.
Q49. A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is:
1. Parallel.
2. Convergent.
3. Divergent.
4. None of these.
Ans: 2. Convergent.
Explanation:
A plane mirror can form a real image if the object itself is virtual.
Q50. A girl is 4 m away from the plane mirror. If she moves few steps closer to the mirror, what will happen to the
image size in the mirror?
1. The size of image will decrease.
2. The size of image will increase.
3. The size of image will be the same.
4. Cannot say.
Ans: 3. The size of image will be the same.
Explanation:
The image formed in the plane mirror is always of the same size as that of the object.
Q51. A burning candle is placed on a table. We can see the light of candle flame when we see it from:
1. Bent tube → by keeping only one eye open.
2. Straight tube → by keeping only one eye open.
3. Spiral tube → by keeping only one eye open.
4. U-shape tube.
5. None of these.
Ans: 2. Straight tube → by keeping only one eye open.
Q52. Which of the following will produce the darkest shadow if the object is placed in front of a source of light?
1. Glass window.
2. Butter paper.
3. Net cloth.
4. Wooden block.
5. None of these.
Ans: 4. Wooden block.
Q53. Bouncing back of light from shining surfaces is called
1. Reflection.
2. Refraction.
3. Bending.
4. Dispersion.
Ans: 1. Reflection.
Explanation: When a ray of light falls on a smooth and polished surface, whole of light is returned back in the same medium. It is
called reflection of light.
Q54. Solar eclips can be seen on __________ day.
1. Full moon.
2. New moon.
3. Crescent moon.
4. Gibbous moon.
5. None of these.
Ans: 2. New moon.
Q55. Which of the following characteristics are observed in an image formed by a pinhole camera?
1. Virtual image.
2. Real image.
3. Erect image.
4. Image of different colour.
5. None of these.
Ans: 2. Real image.
Q56. Which is a device to image the sun?
1. Plane mirror.
2. Pinhole camera.
3. A straight pipe.
4. Glass slab.
Ans: 2. Pinhole camera.
Explanation: Sun can be imaged by using a pinhole camera.
Q57. The diagram shows an object O viewed using two mirrors. A person looks into the mirrors as shown. At which
position is the image of O seen?
1. A.
2. B.
3. C.
4. D.
Ans: 4. D.
Q58. Three sticks are placed in an open field as shown in figure. Which of the following sticks will form the shadow of
equal length?
1. Only sticks (I) and (II).
2. Only sticks (II) and (III).
3. Only sticks (I) and (III).
4. All sticks (I), (II) and (III).
Ans: 3. Only sticks (I) and (III).
Explanation:
The length of the shadow changes according to the position of the source of light, i.e., the sun with respect to the object.
Q59. Which of the following is not a necessary condition for the formation of a shadow?
1. An opaque object.
2. A screen.
3. A transparent object.
4. A source of light.
5. None of these.
Ans: 3. A transparent object.
Q60. Which of the following can never form a circular shadow?
1. A ball.
2. A flat disc.
3. A shoe box.
4. An ice-cream cone.
Ans: 3. A shoe box.
Explanation:
A shoe box can never form a circular shadow because in. any condition it does not have a circular shape. However, a ball, a flat disc
and the base of ice-cream cone can form a circular shadow.
Q61. Four students A, B, C and D looked through pipes of different shapes to see a candle flame as shown in Fig.
Who will be able to see the candle flame clearly?
1. A
2. B
3. C
4. D
Ans: 4. D
Explanation:
Student D will be able to see the candle flame clearly because light travels along a straight line. However, students A, B and C will not
be able to see the flame clearly because the tubes are not straight.
Q62. Vijay puts some water into four cups made of steel, porcelain, glass, frosted glass. Which one of these cups will
allow him to see the level of the water clearly?
1. Glass cup.
2. Steel cup.
3. Porcelain cup.
4. Frosted glass cup.
Ans: 1. Glass cup.
Explanation:
Glass is a transparent material. It allows light to pass through it.
Q63. When Abhishek looked at a lighted torch through an object he could see a faint glow, but not the torch. The
object is:
1. Transparent.
2. Opaque.
3. Translucent.
4. None of these.
Ans: 3. Translucent.
Explanation:
Translucent objects allow only a small part of light to pass through them.
Q64. Non-luminous objects are objects which:
1. Produce their own light.
2. Do not produce its own light.
3. Can be seen only when light falls on them.
4. Both (b) and (c).
5. None of these.
Ans: 4. Both (b) and (c).
Q65. Which of the following is a cold source of light?
1. Firefly (Jugnu).
2. Tube light.
3. The sun.
4. Electric bulb.
Ans: 1. Firefly (Jugnu).
Explanation: Firefly (Jugnu) emits short bursts of light.
Q66. Look at the Venn diagram. Which of the following objects described below are most likely to be I, II and III?
Choose the correct option.
1. (I) Oiled paper (II) Air (III) Cellophane paper.
2. (I) Glass (II) Frosted glass (III) Wood.
3. (I) Wax paper (II) Clean water (III) Diamond.
4. (I) Mirror (II) Diamond (III) Amp.
Ans: 2. (I) Glass (II) Frosted glass (III) Wood.
Q67. Which of the following statements is true?
1. The image formed by a pinhole camera is inverted because light travels in a straight line.
2. Light does not change its direction on reflection.
3. As we move the object away from the light source, the shadow of the object becomes smaller.
4. Reflection is possible only from polished surface.
Ans: 1. The image formed by a pinhole camera is inverted because light travels in a straight line.
Explanation:
Light changes its direction after reflection. As we move the object away from the light source, the shadow becomes larger as the
distance between object and the light source increases. Reflection is possible from rough surface also.
Q68. Which of the following characteristics of an image does not belong to convex mirror?
1. Real image.
2. Virtual image.
3. Smaller image.
4. Erect image.
5. None of these.
Ans: 1. Real image.
Q69. Which of the following is a translucent object?
1. Cardboard.
2. Tracing paper.
3. Clear glass.
4. Air.
5. None of these.
Ans: 2. Tracing paper.
Q70. Narrow beam of light before reflection in known as:
1. Reflected ray.
2. Incident ray.
3. Normal ray.
4. Reflection.
5. None of these.
Ans: 2. Incident ray.
Q71. Light travels in
1. Straight line.
2. Curved line.
3. Zig-zag line.
4. Randomly.
Ans: 1. Straight line.
Explanation: Light travels in straight line.
Q72. Opaque objects:
1. Allow light to pass through them.
2. Allow light to pass through them partially.
3. Allow light not to pass through them.
4. Both (b) and (c).
5. None of these.
Ans: 3. Allow light not to pass through them.
Q73. We can see any object if:
1. It is a luminous object.
2. It reflects the light falling on it.
3. It is placed in a dark room.
4. Both (a) and (b).
5. None of these.
Ans: 4. Both (a) and (b).
Q74. Light travels in a:
1. Circular path.
2. Rectilinear path.
3. Rotational path.
4. Triangular path.
5. None of these.
Ans: 2. Rectilinear path.
Q75. Which of the following is not translucent:
1. Fog.
2. Notebook.
3. Smoke.
4. Sheet of polythene.
Ans: 2. Notebook.
Q76. What type of object is sheet of cellophane?
1. Transparent.
2. Translucent.
3. Opaque.
Ans: 1. Transparent.
Q77. Which of the following is not a primary colour of white light?
1. Red.
2. Green.
3. Orange.
4. Blue.
5. None of these.
Ans: 3. Orange.
Q78.
On the basis of above figure. Light from which source will form shadow on the screen S?
1. Light source A.
2. Light source B.
3. Light source C.
4. All the above.
5. None of these.
Ans: 3. Light source C.
Also Read Notes: –Class 6th Science Chapter 11 Light, Shadows And Reflections