Frank Cce Everyday Science Solutions for Class 6 Science Chapter 11 Light, Shadows And Reflections are provided here with simple step-by-step explanations. These solutions for Light, Shadows And Reflections are extremely popular among class 6 students for Science Light, Shadows And Reflections Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Frank Cce Everyday Science Book of class 6 Science Chapter 11 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Frank Cce Everyday Science Solutions. All Frank Cce Everyday Science Solutions for class 6 Science are prepared by experts and are 100% accurate.

Page No 147:

Question A:

Solve the following crossword puzzle:
Figure

Across
3. Bodies emitting light of their own
4. It is the dark outline of an object

Down
1. It is a natural source of light
2. It is a living source of light

Answer:



Page No 148:

Question B.1:

Objects which do not allow light to pass through them are called
(a) transparent
(b) translucent
(c) opaque
(d) all the above

Answer:

(c) opaque
Objects that do not allow light to pass through them are called opaque objects.

Page No 148:

Question B.2:

A shadow is
(a) black in colour
(b) red in colour
(c) colour of the object
(d) none of these

Answer:

(a) black in colour
Because there is no light at the place where shadow falls.

Page No 148:

Question B.3:

A highly polished furniture acts like a
(a) pinhole camera
(b) mirror
(c) lens
(d) transparent object

Answer:

(b) mirror
Polished surface is smooth and reflects light very well.

Page No 148:

Question B.4:

An image has
(a) the colour of the object
(b) black colour
(c) no colour at all
(d) all the above

Answer:

(a) the colour of the object
An image is the reflection of an object; therefore, it has the colour of the object.

Page No 148:

Question B.5:

Shadow is formed on the screen
(a) in front of the object
(b) behind the object
(c) does not sustain
(d) none of the above

Answer:

(b) behind the object
Because object blocks all the light falling on it to form shadow behind itself.

Page No 148:

Question B.6:

The nature of the size of the shadow depends on
(a) size of the source of light
(b) size of the object
(c) distance between the source of light an object
(d) all of them

Answer:

(d) all of them
The nature of the size of a shadow depends on the size of the source of light, the size of the object and the distance between the source of light and the object.

Page No 148:

Question C:

Fill in the blanks using the correct word given in the bracket:
1. Light is a form of ............................ . (energy/electricity)
2. All bodies which emit light energy by themselves are called ............................ bodies. (luminous/opaque)
3. Light travels in a ............................ line. (straight/curved)
4. A glowing electric bulb is an example of ............................ source of light. (natural/artificial)
5. Any polished surface from which regular reflection takes place is called a ............................ . (mirror/obstacle)
6. Reflection from a mirror gives clear ............................ . (image/shadow)
7. The shadow of a coloured object is ............................ . (coloured/black)
8. The image formed by a mirror is due to  ............................ of light. (reflection/ propagation)

Answer:

1. Light is a form of energy. (energy/electricity)
2. All bodies which emit light energy by themselves are called luminous bodies. (luminous/opaque)
3. Light travels in a straight  line. (straight/curved)
4. A glowing electric bulb is an example of artificial source of light. (natural/artificial)
5. Any polished surface from which regular reflection takes place is called a mirror. (mirror/obstacle)
6. Reflection from a mirror gives clear image. (image/shadow)
7. The shadow of a coloured object is black. (coloured/black)
8. The image formed by a mirror is due to reflection of light. (reflection/ propagation)



Page No 149:

Question 1:

In what manner does size of our shadow change when we walk in sunlight?

Answer:

The size of our shadow changes with the time of the day as we walk. In the noon, shadow will be smallest as the Sun is exactly over the head and a little light is blocked by our body to form shadow. During sunrise (sunset), the shadow formed is larger in size, as the Sun rises from the horizon (sets in the horizon) and more sunlight is blocked by our body to form longer shadow.

Page No 149:

Question 2:

Is it possible to form two or more shadows of an object at the same time?

Answer:

Yes, it is possible to form two or more shadows of an object at the same time by using two or more sources of light around the object. For example, shadows of cricket players formed in ground when the game is played in artificial lights

Page No 149:

Question 3:

How does the size of the shadow of an object change as the distance between the source of light, the object and the screen are changed?

Answer:

The size of the shadow increases as the distances between the source of light, the object and the screen increase.

Page No 149:

Question 4:

Let us take the example of the object around which light could bend, like water flowing around a stone in its path. Would such an object form a shadow? Justify your statement.

Answer:

No, such an object will not form a shadow. Shadow is the dark outline of an object formed due to the blocking of light by the object. If the light will bend around the object like water around the stone, the back of the object will be illuminated and shadow will not be formed.

Page No 149:

Question 5:

Can we form (i) an image (ii) a shadow without a screen (iii) coloured shadow of an object?

Answer:

(i) Yes, we can form an image using any finely polished object like mirror, teaspoon.
(ii) No, we cannot form a shadow without a screen. An opaque screen is must to form a shadow of an object.
(iii) No, we cannot form a coloured shadow of an object, as shadow is formed by blocking of light from the object.

Page No 149:

Question D:

Match the beginnings and endings of the sentences:

Beginnings Endings
1. A pinhole camera is (a) travelling of light in a straight line.
2. Moon and Venus are (b) natural source of light.
3. Rectilinear propagation of light is (c) give out light of their own.
4. Luminous objects (d) based upon the principle of rectilinear propagation of light.
5. Glow-worm is a (e) illuminating objects.

Answer:

Beginnings Endings
1. A pinhole camera is (d) based upon the principle of rectilinear propagation of light.
2. Moon and Venus are (e) illuminating objects.
3. Rectilinear propagation of light is (a) travelling of light in a straight line.
4. Luminous objects (c) give out light of their own.
5. Glow-worm is a (b) natural source of light.

Page No 149:

Question E.1:

Write True (T) or False (F) against the following statements in the given brackets:
1. Stars are luminous bodies. ( )
2. Translucent objects do not form shadows. ( )
3. An oiled paper is an example of an opaque body. ( )
4. A pinhole camera can take pictures of moving objects. ( )
5. A polished metal surface can't act as a mirror. ( )
6. We can see shadow even if there is no light. ( )
7. A heated iron rod becomes luminous but on cooling it becomes non-luminous. ( )
8. Image of an object is always black, shadow shows the colour of the object. ( )

Answer:

1. True

2. False
Translucent object form a light shadow.

3. False
An oiled paper is an example of translucent body.

4. True

5. False
A Polished metal surface can act as a mirror.

6. False
We see shadow of an object in the presence of light.

7. True

8. False
Shadow of an object is always black. Image shows the colour of the object.



Page No 150:

Question A.1:

Define light.

Answer:

Light is a form of energy which makes us able to see the objects around.

Page No 150:

Question A.2:

What is rectilinear propagation of light?

Answer:

The phenomenon of travelling of light in straight lines is called rectilinear propagation of light.



Page No 151:

Question A.3:

What do you understand by a transparent medium?

Answer:

Transparent medium is a medium that allows light to pass through it completely.

Page No 151:

Question A.4:

What is meant by an opaque medium?

Answer:

Opaque medium is a medium that does not allow light to pass through it. For example, wood and metals are opaque mediums.

Page No 151:

Question A.5:

What is the difference between luminous and non-luminous bodies?

Answer:

Luminous Bodies Non-Luminous Bodies
Luminous bodies emit light of their own. Non-luminous bodies do not emit light of their own.
Examples: Sun and stars Examples: Wood and chair

Page No 151:

Question A.6:

Are images same as shadows?

Answer:

No, images are not same as shadows. Images are formed when light is reflected from a mirror or any shinning object and carry all the details of the object such as colour, size, etc. However, shadow of an object is always black and it does not carry the details of the object like colour, size, etc.

Page No 151:

Question A.7:

State the principle of a pinhole camera.

Answer:

A pinhole camera is based on the principle of rectilinear propagation of light. According to this principle, light always travels in a straight line.

Page No 151:

Question A.8:

What are mirrors? Give three important examples.

Answer:

Any smooth, polished surface that can reflect light rays in the same medium is called mirror. Example: Looking glass, rear view mirror of vehicles, barber's mirror, etc.

Page No 151:

Question B.1:

Distinguish between transparent and translucent bodies.

Answer:

Transparent bodies Translucent bodies
Transparent bodies allow light to pass through them completely. Translucent bodies allow light to pass through them partially.
Examples: Air, glass, water, etc. Examples: Frosted glass, greased paper, wax paper, etc.

Page No 151:

Question B.2:

Define opaque bodies. Give two examples.

Answer:

Opaque bodies are those bodies that do not allow light to pass through them at all. Examples: Wood, chair, metals, etc.

Page No 151:

Question B.3:

What do you mean by reflection of light?

Answer:

The phenomenon of returning of light rays when they fall on the surface of an object is called reflection of light.

Page No 151:

Question B.4:

What is the difference between a shadow and an image?

Answer:

Image  Shadow
An image is formed when the light rays are reflected from a mirror or any shining object. A shadow is formed when the path of light rays gets obstructed by an opaque body.
An image provides all the details of the object such as size, colour. A shadow is a dark outline of an object. It does not show any details of the object.

Page No 151:

Question B.5:

In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?

Answer:

Image is formed due to the reflection of light from a mirror. In a completely dark room, there is no light to get reflected; therefore, we will not see our reflection in the mirror. 

Page No 151:

Question B.6:

Why is moon not a luminous body?

Answer:

Moon is not a luminous body because it does not emit light of its own. Moon reflects the light of the Sun, hence it appears shining.

Page No 151:

Question C.1:

Give the principle, construction and working of a pinhole camera.

Answer:


Principle: A pinhole camera is based on the principle of rectilinear propagation of light which states that light travels in a straight line.
Construction: It consists of a rectangular light-proof box with a small hole in the middle of one face and have shutter arrangement to open and close the hole. A photographic plate is placed on the side opposite to the hole which acts as a screen.
Working: When rays of light coming from an object pass through the fine hole, they form an inverted and small image on the photographic plate. The sharpness and size of the image   depend on the distance of an object from the hole. Hence, it can be altered by adjusting the distance of an object from the hole.

Page No 151:

Question C.2:

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

Answer:

Take a bent tube and try to look at a candle with the help of this tube. We will not be able to see the candle. Now, take a straight tube and try to look at the same candle with the help of this tube. We will be able to see the candle clearly.  This shows that light travels in a straight line.

Page No 151:

Question C.3:

What do you understand by reflection of light? Explain the phenomenon with the help of an experiment.

Answer:


When light rays bounce off the surface of an object, the phenomenon is called reflection of light.
Experiment: Request one of your friends to hold a mirror in his/her hand at one corner of a darkroom. You stand at another corner with a torch in your hand. Switch on the torch and direct its light beam onto the mirror held by your friend.
You can see a patch of light on the other side. Adjust the direction of the torch so that the patch of light falls on another friend standing in the room. This happens due to the reflection of light from the mirror.

Page No 151:

Question C.4:

Distinguish between transparent, translucent and opaque objects.

Answer:

Transparent objects Translucent objects Opaque objects
Transparent objects allow light to pass through them easily. Translucent objects allow light to pass through them partially. Opaque objects do not allow light to pass through them.
We can see clearly through transparent objects. We cannot see through translucent objects clearly. We cannot see through opaque objects.
Examples: Glass, air, water, etc. Examples: Wax paper, greased paper, etc. Examples: Wood, metal, chair, etc.



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