CBSE Class 6 Science Light Shadows And Reflections Worksheet Set E

Match the Column

DIRECTIONS : Match Column-I with Column-II and select the correct answer using the codes given below the columns.

Question.
Column I                                      Column II
A. Lunar eclipse             (p) Has colour of the object
B. Solar eclipse              (q) Always black
C. Image                        (r) Moon between sun and earth
D. Shadow                     (s) Earth between sun and moon.
(a) A → (s); B → (p); C → (r); D → (q)
(b) A → (p); B → (q); C → (r); D → (s)
(c) A → (s); B → (r); C → (q); D → (p)
(d) A → (s); B → (r); C → (p); D → (q)
Answer : D

Question.
Column-I                                                                  Column-II
A. Transparent substance              (p) It allows the light to pass through it almost completely
B. Opaque substance                    (q) It emits light of its own
C. Luminous object                        (r) It does not emit light of its own
D. Non-luminous object                 (s) It does not allow light to pass through it
(a) A→(p); B→(q); C→(r); D→(s)
(b) A→(q); B→(p); C→(s); D→(r)
(c) A→(p); B→(r); C→(q); D→(s
) (d) A→(p); B→(s); C→(q); D→(r)
Answer : D

Passage Based Questions

DIRECTIONS (Qs.41-46 ) : Read the passage (s) given below and answer the questions that follow.

Passage-1
Luminous objects give off their own light, such as the sun and stars.
Fireflies and glow-worms are luminous.
Non-luminous object do not give off light or glow.

Question. Sun is a
(a) non-luminous object
(b) luminous object
(c) transparent object
(d) opaque object
Answer : B

Question. Fireflies is
(a) a glowing object
(b) a deep sea fish
(c) both (a) and (b)
(d) neither (a) nor (b)
Answer : C

Question. Non-luminous objects
(a) have their own light
(b) are visible when they reflect the light fall on them from luminous objects
(c) do not give off light
(d) both (b) and (c)
Answer : D

Passage-2
Take a comb in your right hand and bring it to your hair and look at yourself in mirror.
You can see your own face in the mirror. This is your mirror image.

Question. In your mirror image you appear to be holding the comb in your
(a) left hand
(b) right hand
(c) comb is not visible
(d) None of these is correct
Answer : A

Question. The images of an object formed in a pin hole camera and that in a mirror are
(a) quite similar
(b) quite different
(c) can’t say
(d) All are incorrect
Answer : B

Question. The image formed in a mirror is due to
(a) reflection of light
(b) bending of light
(c) Both the above
(d) None of these
Answer : A

Assertion/ Reason Based Questions

DIRECTIONS : The questions in this segment consists of two statements, one labelled as “Assertion A” and the other labelled as “Reason R”. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Question. Assertion (A) : Shadow forms when light falls on a wooden block.
Reason : Light is reflected when it bounces back of a surface.
Answer : A

Question. Assertion (A) : Solar and lunar eclipses are results of shadow formation.
Reason : Sun is essential for shadow formation.
Answer : C

Question. Assertion (A) : Shadow is formed when an opaque object comes in the path of light.
Reason (R) : An opaque body does not allow any light to pass through it.
Answer : A

Question. Assertion (A) : When we look into the mirror, we see our own face inside the mirror.
Reason (R) : Mirror is made up of a transparent substance that allows the light to pass through it.
Answer : C

Question. Assertion (A) : When the light from a source falls on a mirror it gets reflected.
Reason (R) : On being reflected there is no change in the direction of light.
Answer : C

Question. Assertion (A) : Mirror reflection gives clear images.
Reason (R) : Images are quite similar to shadows.
Answer : C

Statement Based Questions

DIRECTIONS : Read the following two statements carefully and choose the correct options.
(a) Statement (1) is correct while statement (2) is incorrect.
(b) Statement (2) is correct while statement (1) is incorrect.
(c) Both statements are correct
(d) Both statements are incorrect.

Question. Statement-1 : Light travels in a straight line.
Statement-2 : Light requires a medium to travel.
Answer : A

Figure Based Questions

Question. The image formed by pinhole camera on the screen in the figure is

(a) erect and enlarged
(b) inverted and enlarged
(c) erect and diminished
(d) inverted and diminished
Answer : D

Question. The figure shows a light ray moving towards a smooth surface.

Answer : D

Question. Observe the diagram and choose the sequence of energy changes.

(a) Light Energy → Chemical Energy → Potential Energy
(b) Potential Energy → Chemical Energy → Kinetic Energy
(c) Solar Energy → Chemical Energy → Kinetic Energy
(d) Heat Energy → Electrical Energy → Mechanical Energy
Answer : C

I) Fill in the blanks :

1. _____________________________ helps us to see objects.

2. Objects that give out or emit light of their own are called ___________________.

3. ______________________objects allow light to pass through them completely.

4. ______________________ objects do not allow the light to pass through it at all.

5. _______________________ objects allow the light to pass through them partially.

6. Light travels in a ______________________________.

Short Question/Answers-

Question 1:We see the sun rising 81/4 minutes afte it has actually risen. Why?
Answer : The distance between earth and sun is 1485 lakh kilometres. Due to this, sunlight takes 81/4 minutes of time to reach earth. Thus, we see the sun rising 81/4 minutes after it has actually risen.

Question 2: Name two natural sources of light and two human-made sources of light.
Answer : The two natural sources of light are sun and fireflies. Man-made light sources are the electric bulb and the candle.

Question 3: How do we see non-luminous objects?
Answer : When light falls on a non-luminous object, it reflects light in different directions. When this light reaches our eye, we are able to see the object.

Question 4: What is meant by 'rectilinear propagation of light'?
Answer : Light travels along a straight line, this property of light is called as rectilinear propagation of light.

Multiple Choice Questions

Question. What happens to a light beam when it passes through a translucent material such as waxed paper?
(a) Most of the light passes through
(b) Light is reflected in its incident path
(c) Most of the light is absorbed and very little is reflected
(d) Light is not allowed to pass through
Answer : A

Question. A boy of length 10 m, to see his own complete image, requires a plane mirror at least equal to:
(a) 10 m
(b) 5 m
(c) 3.33 m
(d) 2 m
Answer : B

Question. A plane mirror is in front of you in which you can see your image. It is approaching towards you at a speed of 10 cm/sec then at what speed will your image approach you?
(a) 10 cm/sec
(b) 5 cm/sec
(c) 20 cm/sec
(d) 15 cm/sec
Answer : C

Question. What kind of eclipse do we see when the moon is entirely within the Earth’s umbral shadow?
(a) Partial lunar
(b) Partial solar
(c) Total lunar
(d) Total solar
Answer : C

Question. The size of a shadow of an opaque object close to the screen and away from the source of light
(a) increases
(b) decreases
(c) remains the same
(d) first decreases then increases
Answer : B

Question. What happens to the image produced by a pinhole camera when you move the back wall farther from the pinhole? It becomes
(a) larger and fainter
(b) smaller and fainter
(c) larger and brighter
(d) smaller and brighter
Answer : A

Question. A girl holding a ball in her right hand is standing in front of a mirror. The ball will seems to be in her
(a) right hand
(b) left hand
(c) depend on distance between girl and mirror
(d) depend on size of mirror
Answer : B

Question. Non-luminous bodies become visible when they .......... light.
(a) reflect
(b) radiate
(c) refract
(d) none of these
Answer : A

Question. Which is the safest way to view a solar eclipse?
(a) Using a solar filter
(b) A pinhole filter
(c) Binoculars or telescope
(d) None of these
Answer : B

Question. What is the correct alignment during a solar eclipse?
(a) Sun, Moon, Earth
(b) Moon, Sun, Earth
(c) Sun, Earth, Moon
(d) None of these
Answer : A

Question. Select the objects that use reflection of light
(a) a mirror fixed on your dressing table
(b) the side mirror of your car
(c) a periscope
(d) All of the above
Answer : D

Question. We can classify fog as
(a) transparent substance
(b) opaque substance
(c) transluscent substance
(d) None of these
Answer : C

Question. Shadows cannot be formed:
(a) during noontime
(b) in the dark
(c) during morning time
(d) all of these
Answer : A

Question. Select the one that gives a clear reflection of ourselves
(a) stationary surface of clear water
(b) well polished surface of shoes
(c) smooth cushion surface
(d) All of these
Answer : A

Question. A student was asked to observe the night sky and note down various objects observed by him in his note book. He listed the following objects
(i) Stars (ii) Moon
(iii) Clouds
From amongst the above the sources of light in night sky are
(a) (i) only
(b) (ii) only
(c) (iii) only
(d) (i) and (ii)
Answer : A

Question. When light falls on an opaque object
(a) it gets reflected and reaches our eye
(b) it passes through the object
(c) the opaque object sends a signal to our eye that enables us to see the object
(d) None of the above is correct
Answer : A

Question. A tracing paper is a
(a) transparent substance
(b) transluscent substance
(c) opaque substance
(d) can’t say
Answer : B

Question. I have kept an object in my hand and through it tried to look at a lighted torch held against it.
Nothing except a faint glow out lining the object is visible. The object in my hand is
(a) transparent
(b) transluscent
(c) opaque
(d) None of these is correct
Answer : C

Question. Periscope, a device used in U-boats, makes use of
(a) reflection of light
(b) refraction of light
(c) shadow formation by opaque objects
(d) None of these
Answer : A

Question. What happens when lightning occurs?
(a) Light comes from sun to cloud
(b) Light comes from cloud to earth
(c) Electric current flows in atmosphere
(d) Electric current flows from sun to cloud
Answer : C

Question. Which of the following statement(s) is/are correct?
(a) Shadows are formed on the same side as the light source
(b) Shadows are formed on the opposite side to the light source
(c) Shadows give us an exact idea of the shape of the object
(d) None of these is correct
Answer : B

Question. Which of the following statement(s) is/are correct?
(a) A shadow is formed when an opaque object comes in the path of light
(b) For the formation of shadow we need and opaque object and a source of light only
(c) The colour of shadow of an object will be different when seen in light coming from different sources
(d) All the above are correct.
Answer : A

Question. An object that does not emit light of its own but is visible due to the light from a source of light falling on it, is
(a) luminous object
(b) non-luminous object
(c) either luminous or non-luminous
(d) None of these
Answer : B

Question. Moon is considered a non-luminous object as
(a) it emits light only during night
(b) it does not emit its own light
(c) it is visible during night only
(d) All the above are correct
Answer : B

Question. Transluscent body is one that
(a) allows almost whole of light to pass through it
(b) allows light to pass through it only partly
(c) through which we can see objects clearly
(d) None of the above is correct
Answer : B

Question. The image formed by a pinhole camera is inverted because
(a) light travels in straight lines
(b) on passing through a pin hole camera there occurs a lateral inversion in the rays of light
(c) light rays get reflected in a pin hole camera
(d) None of the above is correct
Answer : A

Question. For making a periscope, the number of mirrors needed is
(a) 1
(b) 2
(c) 3
(d) 4
Answer : B

Question. A handicapped person has three fingers and has no thumb in his left hand but his right hand has four fingers as also the thumb. He holds a mirror in his right hand and looks at this own image in a mirror. In the mirror image he will appear as holding his comb with
(a) three fingers
(b) four fingers
(c) none of these
(d) can’t say
Answer : B

Match the Column

DIRECTION : Match Column-I with Column-II and select the correct answer using the code given below the columns.

Question.
Column-I                                         Column-II
A. Pin-hole camera                (p) Forms an inverted image
B. Mirror                               (q) Forms a lateral image
C. Periscope                          (r) Used in U-boats
D. Kaleidoscope                    (s) Makes use of reflection of light
(a) A → (p); B → (q); C → (r); D → (s)
(b) A → (p); B → (r); C → (s); D → (q)
(c) A → (q); B → (p); C → (r); D → (s)
(d) A → (s); B → (p); C → (q); D → (r)
Answer : A

Question.
Column-I                                              Column-II
A. Light                              (p) Shows that light travels in straight lines
B. Luminous object             (q) An agent that produces a sensation of sight in us.
C. Shadow formation          (r) Non-luminous object
D. A pair of shoes               (s) An object that gives out light of its own
(a) A → (p); B → (q); C → (r); D → (s)
(b) A → (q); B → (r); C → (s); D → (p)
(c) A → (q); B → (s); C → (p); D → (r)
(d) A → (r); B → (p); C → (q); D → (s)
Answer : C

Passage Based Questions

DIRECTIONS : Read the passage (s) given below and answer the questions that follow.

Passage -1
On the basis of the given diagram answer the following questions.

Question. ‘Region of full shadow’ is called
(a) umbra
(b) penumbra
(c) source
(d) curved path
Answer : A

Question. ‘Region of partial shadow’ is called
(a) umbra
(b) penumbra
(c) source
(d) curved path
Answer : B

Question. In solar eclipse, sun’s light blocks out on the surface of
(a) Moon
(b) Sun
(c) Earth
(d) All of these
Answer : C

Passage -2
You can make a simple periscope by placing two mirrors in a ‘Z’ shaped box as shown in figure below.

Question. Periscope is a device
(a) used in U-boats
(b) that makes use of reflection of light
(c) Both the above
(d) None of these
Answer : C

Question. Periscope is a device
(a) that uses reflections to see around corners
(b) that uses the property of light that light travels in straight lines
(c) Both the above
(d) None of these
Answer : C

Question. Which of the following device makes use of reflection of light?
(a) Kaleidoscope
(b) Periscope
(c) Both of the above
(d) None of these
Answer : C

Assertion/ Reason Based Questions

DIRECTIONS : The questions in this segment consists of two statements, one labelled as “Assertion A” and the other labelled as “Reason R”. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Question. Assertion (A) : Shadow is always black.
Reason (R) : A shadow only shows the outline of an object.
Answer : A

Question. Assertion (A) : Image has the colour of the object.
Reason (R) : Image gives only the outline of the object.
Answer : C

Question. Assertion (A) : In cars the windshields made of glass are used.
Reason (R) : Those substances through which things can be seen clearly are called transparent substances.
Answer : B

Statement Based Questions

DIRECTIONS : Read the following three statementscarefully and choose the correct option.
(a) Statement (1) and (3) are incorrect while statement (2) is correct.
(b) Statement (1) and (2) are incorrect while (3) is correct.
(c) All the statements are correct.
(d) All the statements are incorrect.

Question.
Statement-1 : The length of shadow formed by sunlight remains constant with time.
Statement-2 : The speed of light in air is 3 × 108 m/s.
Statement-3 : Speed of light remains same in all medium.
Answer : A

Figure Based Questions

Question. When parallel rays of light are incident on an irregular surface as shown in the figure, which phenomenon of light occurs?

(a) Regular reflection
(b) Diffuse reflection
(c) Dispersion
(d) Refraction
Answer : B

Question. The less dark region in the given image is called

(a) umbra
(b) penumbra
(c) dark region
(d) None of these
Answer : B

Question. A lamp, a ball and a paper are kept as shown in the figure below. What will be the change in the shadow, if the ball is moved from A to B?

(a) Become large
(b) Remain same
(c) Become small
(d) Get distorted
Answer : A

Question. Look at the picture and answer the question given below :

Why is a dark shadow not formed by glass tumbler ?
(a) The source of light is not a strong source
(b) It is not night time
(c) The tumbler is made of transparent material
(d) All the above are correct
Answer : C

LIGHT SHADOWS AND REFLECTIONS

Q1. What are luminous and non-luminous objects? Give examples.

Q2. Differentiate between transparent, translucent and opaque objects withexamples.

Q3. What is a shadow? How is it formed?

Q4. List the conditions essential for the formation of a shadow.

Q5. Classify the following as transparent, translucent and opaque objects:

        a) Stone                                                                                       f) Wood

        b) Wax paper                                                                               g) Smoke

        c) Reading glasses                                                                     h) Leather

        d) Common salt                                                                           i) Blood

        e) Skin of a drum                                                                         j) Dense fog

Q6. What type of shadows are formed by transparent, translucent and opaue objects?

Q7. Why do we not see the shadow of aeroplanes and birds flying in the sky?

Q8. State the principle behind the working of a pinhole camera. Describe in detail how youwill make a simple pinhole camera at home.

Q9. List the characteristics of the image formed in a pinhole camera.

Q10. Describe an activity to show that light travels in a straight line.

Q11. Define reflection of light.

Q12. Fill in the blanks:

1. ____________ objects do not caste any shadow.

2. Moon is a _____________ object. (luminous/nonluminous)

3. Shadows give us information about the _____________ of the object.

4. Solar and Lunar eclipse are examples of _____________ formation in nature.

5. A _____________ changes the direction of light that falls on it.

Short Question/Answers-

Question 1: What are 'translucent' objects? Give two examples.
Answer : Translucent objects are the ones through which light is only partially transmitted. Butter paper and thin plastic sheets are translucent objects.

Question 2: When is a shadow formed?
Answer : A shadow is formed when the light from a source is obstructed by an opaque object.

Question 3: Why does a solar eclipse always occur on a new moon day?
Answer : A solar eclipse occurs when the sun, the moon and the earth are in straight line, with the moon between the sun and the earth. Therefore, during the solar eclipse, the dark side of the moon faces the earth. It occurs on a new moon day.

Question 4: When can you see an image of an object in a plane mirror?
Answer : You can see an image in a plane mirror if an object is placed in front of the plane mirror.

I) Fill in the blanks :

1. _____________________________ helps us to see objects.

2. Objects that give out or emit light of their own are called ___________________.

3. ______________________objects allow light to pass through them completely.

4. ______________________ objects do not allow the light to pass through it at all.

5. _______________________ objects allow the light to pass through them partially.

6. Light travels in a ______________________________.

7. _____________________ are formed when an opaque object comes in the path of light.

8. ______________________ and ____________________ objects are essential for the formation of shadows on a screen.

9. A shadow cast by the heavenly bodies is called an ______________________.

10. Images formed by a pin –hole camera are ___________________________

11. We see ________________________ of the object in the mirror.

II) Answer in one or two words :

1. Give two examples of opaque objects.

2. Give two examples transparent objects

3. Give two examples of translucent objects.

4. Give two examples of luminous objects

5. Give two examples of non-luminous objects.

III) Choose the correct Answer :

1. [Mirror/glass] helps to change the direction of light that falls on it.

2. Images are [ same / different] from the shadow.

3. Torch bulb is [ luminous / non – luminous object]

4. [opaque/transparent] objects cast shadows.

5. Coloured objects form [coloured / dark] shadows.

IV) Answer the following questions :

1. How are shadows formed ?

2. What is meant by reflection of light ?

3. Explain with the help of an activity that light travels in a straight line.

V) Define :

1. Opaque objects

2. Shadows

3. Reflection of light

VI) Distinguish between

1. Transparent and translucent objects

2. Luminous and non luminous objects.

Fill in the blanks:

1. All sources of light can be classified into two categories _______ and __________

2. Moon and planets do not emit light of their own, but they reflect the light of the __________ falling on them.

3. A non-luminous body can be made luminous by ______________ it.

4. A source of light which is of the size of the head of a common pin is called ______________ source of light.

5. A collection of a large number of rays of light is called a _____________ of light.

6. The property of light by which it travels in a straight line is called -_______________ propagation of light.

7. The image formed in pinhole camera is ___________, ______________, ______________ in size.

Answer the following :

1. Two differences between a shadow and an image formed in pin-hole camera.

2. How much time the light from the sun takes to reach the earth ?

3. Define mirror.

Q.1.When light falls on an object, it can be absorbed, reflected or allowed to pass through. What does an opaque object? How do we see it?

Q.2. What kind of a shadow would you expect to see if you place a ball in the path of light emerging from a torch?

Q.3. Give one word

(1) A device used to take pictures.

(2). The principle on which a pin hole camera works.

(3.) An object which has its own light.

(4.) An object that passes all the light falling on it.

Q.4. If the distance between the mirror and the object is 2m. Find the distance between the mirror and the image. Also find the distance between the object and the image?

Q.5. Give the characteristics of the image formed by a plane mirror?

Q.6. Draw the images of the alphabets A to Z when seen through a plane mirror?

Q.7. If the angle of the incidence is 30degree, what will be the angle of reflection? Also find the angle between the mirror and the incident ray?

Q8. Identify the following as transparent, translucent, opaque, luminous, nonluminous

Air, eyelid, ourskin, pencil Jupiter, chair, paper, water, lightedblub?

Q.9. What are the factors on which the shape, size and nature of the shadow depends on?

Q10. Why you cannot see anything’s in a dark room?