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All questions of Light, Shadows & Reflections for Class 6 Exam
The focus of a concave mirror is __________.
- a)Virtual
- b)Real
- c)Undefined
- d)At the pole
Correct answer is option 'B'. Can you explain this answer?
The focus of a concave mirror is __________.
a)
Virtual
b)
Real
c)
Undefined
d)
At the pole
|
|
Sakshi Kumari answered |
A concave mirror is said to have a real focus whereas a convex mirror is said to have a virtual focus.
Three identical towels of green, blue and red colours are hung on a clothesline in the sun. What would be the colour of shadows of these towels?
- a)B and C both are correct
- b)The colour of shadow does not depend on the colour of the object. The shadow is always black in colour. So, all three towels will form same colour shadow.
- c)The colour of shadow does not depend on the colour of the object, it depends on the thickness of the object. The shadow is always black in colour. So, all three towels will form same colour shadow
- d) The colour of shadow depends on the colour of the object. So, all three towels will form same colour shadow as their original colours
Correct answer is option 'A'. Can you explain this answer?
Three identical towels of green, blue and red colours are hung on a clothesline in the sun. What would be the colour of shadows of these towels?
a)
B and C both are correct
b)
The colour of shadow does not depend on the colour of the object. The shadow is always black in colour. So, all three towels will form same colour shadow.
c)
The colour of shadow does not depend on the colour of the object, it depends on the thickness of the object. The shadow is always black in colour. So, all three towels will form same colour shadow
d)
The colour of shadow depends on the colour of the object. So, all three towels will form same colour shadow as their original colours
|
Chandana Chandana answered |
A) The colour of shadow does not depend on the colour of the object.The shadow is always black in colour. So,all three towels will form same colour shadow
Why do the shadows made by the sun change in size during the course of the day?- a)Because the weather changes
- b)Because the objects keep moving
- c)Because the sun appears to move across the sky during the course of the day
- d)Because the amount of light, emitted by the sun, keeps on changing
Correct answer is option 'C'. Can you explain this answer?
Why do the shadows made by the sun change in size during the course of the day?
a)
Because the weather changes
b)
Because the objects keep moving
c)
Because the sun appears to move across the sky during the course of the day
d)
Because the amount of light, emitted by the sun, keeps on changing
|
Anita Menon answered |
Shadows change size during the day because of the position of the Sun. When the Sun is overhead shadows are short. At dusk and at dawn shadows are long.
One night, Ahana was sleeping on her terrace. She looked up at the night sky and observed the things she could see. She made a list of the sources of light in night sky. What should she have written down on her list?- a)Moon
- b)Clouds
- c)Moon and stars
- d)Clouds and moon
Correct answer is option 'C'. Can you explain this answer?
One night, Ahana was sleeping on her terrace. She looked up at the night sky and observed the things she could see. She made a list of the sources of light in night sky. What should she have written down on her list?
a)
Moon
b)
Clouds
c)
Moon and stars
d)
Clouds and moon
|
|
Veereshb12 . answered |
Moons and stars Saptarshi etc.
A girl is 2 m away from a plane mirror. If she moves away from the mirror by 0.5 m, what will be the new distance between the object and its image?- a)2 m
- b)1.5 m
- c)3 m
- d)5 m
Correct answer is option 'D'. Can you explain this answer?
A girl is 2 m away from a plane mirror. If she moves away from the mirror by 0.5 m, what will be the new distance between the object and its image?
a)
2 m
b)
1.5 m
c)
3 m
d)
5 m
|
Meghana Iyer answered |
The HCF of two or more numbers is the largest common factor of the given numbers. It is the smallest number which divides the two or more given numbers.
The LCM of two or more numbers is the smallest number that is a common multiple of two or more numbers. It is the smallest number which is divisible by two or more given numbers.
Consider two numbers 120 and 144.
Prime factorization of 120 = 2 X 2 X 2 X 3 X 5
Prime factorization of 144 = 2 X 2 � 2 X 2 X 3 X 3
HCF of 120 and 144 = 2 X 2 X 2 X 3 = 24. 24 is the largest number which divides both 120 and 144.
LCM of 120 and 144 = 2 X 2 X 2 X 2 X 3 X 3 X 5 = 720. 720 is the smallest number which is divisible by both 120 and 144.
Sanchit, Ananya, Ruhi and Rohit are discussing light, shadow and reflection. Choose the incorrect statement.
- a)Sanchit: Light is a form of energy which cannot be seen directly
- b)Ananya: The image formed by a pin-hole camera is inverted
- c)Ruhi: We see the moon because it is a luminous body
- d)Rohit: Plane mirror is used in periscope
Correct answer is option 'C'. Can you explain this answer?
Sanchit, Ananya, Ruhi and Rohit are discussing light, shadow and reflection. Choose the incorrect statement.
a)
Sanchit: Light is a form of energy which cannot be seen directly
b)
Ananya: The image formed by a pin-hole camera is inverted
c)
Ruhi: We see the moon because it is a luminous body
d)
Rohit: Plane mirror is used in periscope
|
Aaditya answered |
A.) Light is a form of energy which cannot be seen, is correct answer
not
C) Because moon is a luminous object ,
moon is not a luminous object
not
C) Because moon is a luminous object ,
moon is not a luminous object
If you stand before a plane mirror, your left hand appears right. This phenomenon is:- a)The reflection of light
- b)The lateral inversion of light
- c)The shadow formation
- d)The diffusion of light
Correct answer is option 'B'. Can you explain this answer?
If you stand before a plane mirror, your left hand appears right. This phenomenon is:
a)
The reflection of light
b)
The lateral inversion of light
c)
The shadow formation
d)
The diffusion of light
|
Kunal Khanna answered |
Lateral inversion is a phenomenon in which left appears to be right and vice versa. It is due to the direction that light follows when it strikes a reflecting surface, generally a mirror.
Sanchit performed the following experiment: In a dark room, Sanchit took a flashlight, placed a cardboard in front of the flashlight and made a small hole at the centre of the cardboard. Then he switched on the flashlight.
He observed that the light appears to come out from the small hole in a straight line.Conclusion of the above experiment could be:- a)Light travels in a straight line
- b)This demonstrates the rectilinear propagation of light
- c)A and B both
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
Sanchit performed the following experiment: In a dark room, Sanchit took a flashlight, placed a cardboard in front of the flashlight and made a small hole at the centre of the cardboard. Then he switched on the flashlight.
He observed that the light appears to come out from the small hole in a straight line.Conclusion of the above experiment could be:
a)
Light travels in a straight line
b)
This demonstrates the rectilinear propagation of light
c)
A and B both
d)
None of the above
|
|
Vinod Darekar answered |
Correct answer is option C
In a completely dark room, if you hold up a mirror in front of you, you will see:- a)Your shadow
- b)A sharp shadow
- c)Your image
- d)No image
Correct answer is option 'D'. Can you explain this answer?
In a completely dark room, if you hold up a mirror in front of you, you will see:
a)
Your shadow
b)
A sharp shadow
c)
Your image
d)
No image
|
|
Omsubham Gouda answered |
No shadows because it is dark and if there is light then mirror will put the light on a object and form shadows but
due to dark and no lumnious object so no shadow will form.
due to dark and no lumnious object so no shadow will form.
When the moon comes in between the sun and the earth in a straight line, then a solar eclipse is formed. The eclipse occurs because of the __________.- a)Formation of a shadow of the earth on the moon
- b)Formation of a shadow of the moon on the earth
- c)Reflection of light by the earth
- d)Reflection of light by the moon
Correct answer is option 'B'. Can you explain this answer?
When the moon comes in between the sun and the earth in a straight line, then a solar eclipse is formed. The eclipse occurs because of the __________.
a)
Formation of a shadow of the earth on the moon
b)
Formation of a shadow of the moon on the earth
c)
Reflection of light by the earth
d)
Reflection of light by the moon
|
Dr Manju Sen answered |
- A solar eclipse occurs when the moon comes between the sun and the earth, aligning in a straight line.
- This alignment causes the moon to cast a shadow on the earth.
- The shadow forms because the moon blocks the sunlight from reaching certain parts of the earth.
- The dark inner part of the shadow, where the sun is completely obscured, is called the umbra, and the outer part, where the sun is partially seen, is the penumbra.
- Thus, the correct answer is B: Formation of a shadow of the moon on the earth.
- This alignment causes the moon to cast a shadow on the earth.
- The shadow forms because the moon blocks the sunlight from reaching certain parts of the earth.
- The dark inner part of the shadow, where the sun is completely obscured, is called the umbra, and the outer part, where the sun is partially seen, is the penumbra.
- Thus, the correct answer is B: Formation of a shadow of the moon on the earth.
Which of the following statements is true?- a)The image formed by a pinhole camera is inverted because light travels in a straight line.
- b)Light does not change its direction on reflection.
- c)As we move the object away from the light source, the shadow of the object becomes smaller.
- d)Reflection is possible only from polished Surface.
Correct answer is option 'A'. Can you explain this answer?
Which of the following statements is true?
a)
The image formed by a pinhole camera is inverted because light travels in a straight line.
b)
Light does not change its direction on reflection.
c)
As we move the object away from the light source, the shadow of the object becomes smaller.
d)
Reflection is possible only from polished Surface.
|
|
Dr Manju Sen answered |
The image formed by the pinhole camera on the screen is real and inverted. 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. Irregular reflection occurs from a rough surface.
Shadow is formed due to:- a)The rectilinear propagation of light
- b)The parallel propagation of light
- c)The passing of light through object
- d)All of them
Correct answer is option 'A'. Can you explain this answer?
Shadow is formed due to:
a)
The rectilinear propagation of light
b)
The parallel propagation of light
c)
The passing of light through object
d)
All of them
|
Rohan Khanna answered |
Shadows are formed when something comes into the path of light through which light rays couldn 't pass as light travels in straight line (or rectilinear propagation). It forms on the opposite side of the light source.
The image given above depicts:- a)A pinhole camera
- b)A periscope
- c)An eclipse
- d)A and C both
Correct answer is option 'A'. Can you explain this answer?
The image given above depicts:
a)
A pinhole camera
b)
A periscope
c)
An eclipse
d)
A and C both
|
|
Amit Sharma answered |
A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole camera – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
Butter paper is an example of _______ object.- a)A transparent
- b)A translucent
- c)An opaque
- d)A luminous
Correct answer is option 'B'. Can you explain this answer?
Butter paper is an example of _______ object.
a)
A transparent
b)
A translucent
c)
An opaque
d)
A luminous
|
|
V. lihitha reddy answered |
Butter paper is a translucent object because
when you put butter paper in front of the candle it visible like blur but something is also visible so butter paper is translucent.
when you put butter paper in front of the candle it visible like blur but something is also visible so butter paper is translucent.
Light is a form of energy that is produced by a:
- a)Transparent object
- b)Luminous object
- c)Non-luminous object
- d)Opaque object
Correct answer is option 'B'. Can you explain this answer?
Light is a form of energy that is produced by a:
a)
Transparent object
b)
Luminous object
c)
Non-luminous object
d)
Opaque object
|
Avni rane answered |
Light is produced by luminous objects, which are objects that emit their own light, such as the Sun, stars, or light bulbs. Non-luminous objects do not emit light but can reflect light from luminous objects. Transparent objects allow light to pass through them, and opaque objects block light from passing through.
Place a lamp close to a mug and observe its shadow on a table. Notice that the shadow formed has two parts. The darker part of the shadow, is the___________ and the lighter part is the ___________.- a)Umbra, penumbra
- b)Penumbra, umbra
- c)Thicker, thinner
- d)Only Penumbra
Correct answer is option 'A'. Can you explain this answer?
Place a lamp close to a mug and observe its shadow on a table. Notice that the shadow formed has two parts. The darker part of the shadow, is the___________ and the lighter part is the ___________.
a)
Umbra, penumbra
b)
Penumbra, umbra
c)
Thicker, thinner
d)
Only Penumbra
|
Muskaan Joshi answered |
Understanding Shadows: Umbra and Penumbra
When a light source, like a lamp, shines on an object, it creates a shadow on the surface behind it, such as a table. This phenomenon can be explained through two distinct parts of the shadow: the umbra and the penumbra.
What is Umbra?
- The umbra is the darker part of the shadow.
- It occurs where the light source is completely blocked by the object (in this case, the mug).
- In the umbra, no light from the lamp reaches the table, resulting in a deep, dark shadow.
What is Penumbra?
- The penumbra is the lighter part surrounding the umbra.
- Here, the light source is only partially blocked by the object.
- Some light still reaches the table, making this area less dark than the umbra.
Why Does This Happen?
- The shape of the light source matters; if it’s a point source (like a small bulb), the shadow will have a more defined umbra and penumbra.
- If the light source is larger, the penumbra may extend further, making shadows appear softer.
Conclusion
Understanding umbra and penumbra helps explain how shadows are formed and illustrates the interaction between light and objects. Observing these concepts in real life, like with your mug and lamp, enhances your grasp of basic physics and light behavior!
When a light source, like a lamp, shines on an object, it creates a shadow on the surface behind it, such as a table. This phenomenon can be explained through two distinct parts of the shadow: the umbra and the penumbra.
What is Umbra?
- The umbra is the darker part of the shadow.
- It occurs where the light source is completely blocked by the object (in this case, the mug).
- In the umbra, no light from the lamp reaches the table, resulting in a deep, dark shadow.
What is Penumbra?
- The penumbra is the lighter part surrounding the umbra.
- Here, the light source is only partially blocked by the object.
- Some light still reaches the table, making this area less dark than the umbra.
Why Does This Happen?
- The shape of the light source matters; if it’s a point source (like a small bulb), the shadow will have a more defined umbra and penumbra.
- If the light source is larger, the penumbra may extend further, making shadows appear softer.
Conclusion
Understanding umbra and penumbra helps explain how shadows are formed and illustrates the interaction between light and objects. Observing these concepts in real life, like with your mug and lamp, enhances your grasp of basic physics and light behavior!
Answer the following questions based on the images below.
Q. Are candles, light bulbs, flame, CFL’s, tube-lights, kerosene lamps etc. man-made or natural sources of light?- a)Man-made sources of light
- b)Natural light sources
- c)Some are natural; some are man-made sources of light
- d)None of them
Correct answer is option 'C'. Can you explain this answer?
Answer the following questions based on the images below.
Q. Are candles, light bulbs, flame, CFL’s, tube-lights, kerosene lamps etc. man-made or natural sources of light?
a)
Man-made sources of light
b)
Natural light sources
c)
Some are natural; some are man-made sources of light
d)
None of them
|
Raman Jeet answered |
Because they are made by people or man-made
A boy did the following experiment.
He kept a wooden cube in front of a screen. He had three torches with him.
Without changing the position of the cube and the screen, he placed the other two torches one after the other, in the position of torch 1, and saw the shadow.
Q. Which torch will make the largest shadow(umbra) on the screen?- a)Torch 1
- b)Torch 2
- c)Torch 3
- d)The size of the shadow will be the same for all the three torches.
Correct answer is option 'D'. Can you explain this answer?
A boy did the following experiment.
He kept a wooden cube in front of a screen. He had three torches with him.
He kept a wooden cube in front of a screen. He had three torches with him.
Without changing the position of the cube and the screen, he placed the other two torches one after the other, in the position of torch 1, and saw the shadow.
Q. Which torch will make the largest shadow(umbra) on the screen?
Q. Which torch will make the largest shadow(umbra) on the screen?
a)
Torch 1
b)
Torch 2
c)
Torch 3
d)
The size of the shadow will be the same for all the three torches.
|
Rajesh Moorthy answered |
D
Answer the following questions based on the images below.
Q. Natural light sources include sun, glowing rocks (lava from volcanoes), and ___________.- a)Fire
- b)Flame
- c)Torch
- d)Fire and flame
Correct answer is option 'D'. Can you explain this answer?
Answer the following questions based on the images below.
Q. Natural light sources include sun, glowing rocks (lava from volcanoes), and ___________.
a)
Fire
b)
Flame
c)
Torch
d)
Fire and flame
|
Rahul Kumar answered |
A torch is an electric device, whereas a flame and a fire are natural sources of light. Therefore the correct option would be D
Chapter doubts & questions for Light, Shadows & Reflections - Science Olympiad Class 6 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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