Important questions class 7 science chapter 11 help students revise Light, Shadows and Reflections through direct answers and exam-style practice. This chapter explains how light travels, how shadows form, and how mirrors create images.
Light, Shadows and Reflections is an important Class 7 Science chapter because it connects daily observations with science concepts. Students learn why the Moon shines, why shadows change size, why mirrors reverse left and right, and how a pinhole camera forms an inverted image.
Light helps us see objects around us. Some objects produce their own light, while others become visible by reflecting light.
Class 7 Science Chapter 11 explains these ideas through simple activities. Students study luminous objects, non-luminous objects, transparent materials, shadow formation, plane mirrors, lateral inversion, pinhole cameras, periscopes, and kaleidoscopes.
Key Takeaways
| Concept |
What Students Should Remember |
| Luminous objects |
Objects that emit their own light |
| Non-luminous objects |
Objects that reflect light from another source |
| Light travel |
Light travels in a straight line |
| Transparent materials |
Allow almost all light to pass through |
| Translucent materials |
Allow some light to pass through |
| Opaque materials |
Block light and form dark shadows |
| Shadow formation |
Needs light source, opaque object, and screen |
| Reflection |
Bouncing back of light from a shiny surface |
| Plane mirror image |
Erect, same size, virtual, laterally inverted |
| Lateral inversion |
Left appears right and right appears left |
| Pinhole camera |
Forms an inverted image on a screen |
Overview of Important Questions Class 7 Science Chapter 11
Class 7 science chapter 11 important questions focus on how light behaves. Students should understand definitions, examples, activities, and reasoning-based questions.
This chapter has many activity-based topics. Exams may ask students to explain why light travels straight, why shadows form, why mirror images reverse left and right, and why pinhole camera images appear upside down.
Important questions class 7 science chapter 11 for quick revision
These questions help students revise the chapter before exams:
- What are luminous and non-luminous objects?
- How does light travel?
- What are transparent, translucent, and opaque objects?
- What are the conditions needed for shadow formation?
- Why does shadow size change?
- What is reflection of light?
- What are the properties of a plane mirror image?
- What is lateral inversion?
- Why is AMBULANCE written in reverse?
- Why does a pinhole camera form an inverted image?
Class 7 Science Important Questions for All Chapters
Important Topics in Class 7 Science Chapter 11
This chapter is easier when students divide it into light sources, materials, shadows, reflection, and image formation. Each topic connects with a classroom activity.
Students should focus on examples and observations. This helps them answer both direct questions and reasoning-based questions.
Sources of light
Sources of light are objects that give out light. The Sun, stars, fireflies, candles, and bulbs are examples.
Luminous and non-luminous objects
Luminous objects emit their own light. The Sun, stars, fireflies, and burning candles are luminous objects.
Non-luminous objects do not emit light. The Moon, planets, books, and mirrors are visible because they reflect light.
Straight-line travel of light
Light travels in a straight line. This is shown using matchbox holes or a straight pipe.
If the holes are not aligned, light does not reach the screen. If a pipe is bent, we cannot see the flame through it.
Transparent, translucent, and opaque materials
Transparent materials allow almost all light to pass through. Clear glass and clean water are examples.
Translucent materials allow only some light to pass through. Tracing paper and frosted glass are examples.
Opaque materials do not allow light to pass through. Wood, cardboard, and thick cloth are examples.
Reflection of light
Reflection is the bouncing back of light from a shiny surface. A mirror reflects light and helps form an image.
Pinhole camera
A pinhole camera is a simple device with a tiny hole and a screen. It forms an inverted image because light travels in straight lines.
Class 7 Science Chapter 11 Notes
Class 7 science chapter 11 notes should include definitions, examples, activity conclusions, and image properties. These points help students revise the chapter quickly.
Students should remember these core facts:
- Light travels in a straight line.
- The Moon is non-luminous because it reflects sunlight.
- Opaque objects form the darkest shadows.
- A shadow needs a light source, an opaque object, and a screen.
- A plane mirror forms an erect and laterally inverted image.
- The image distance equals the object distance in a plane mirror.
- A pinhole camera forms an inverted image.
- A periscope uses two plane mirrors.
- A kaleidoscope uses multiple reflections.
- Lateral inversion reverses left and right.
Light Shadows and Reflections Class 7 Important Questions
Light shadows and reflections class 7 important questions test definitions, examples, and reasoning. Students should answer in simple sentences and use correct science terms.
These questions are useful for 1-mark and 2-mark exam practice.
Q1. What is a luminous object?
A luminous object emits its own light. The Sun, stars, fireflies, and burning candles are examples.
Q2. What is a non-luminous object?
A non-luminous object does not emit its own light. It becomes visible by reflecting light from another source.
Q3. Is the Moon a luminous object?
No. The Moon is non-luminous because it reflects sunlight.
Q4. How does light travel?
Light travels in a straight line.
Q5. What is a shadow?
A shadow is a dark region formed when an opaque object blocks light.
Q6. What are the three requirements for shadow formation?
A light source, an opaque object, and a screen are needed for shadow formation.
Q7. What is reflection of light?
Reflection is the bouncing back of light from a shiny surface.
Q8. What is lateral inversion?
Lateral inversion is the left-right reversal seen in a plane mirror image.
Q9. What is a pinhole camera?
A pinhole camera is a device that forms an inverted image on a screen through a tiny hole.
Q10. Which material forms the darkest shadow?
Opaque material forms the darkest shadow because it blocks light completely.
Light Shadows and Reflections Class 7 Questions and Answers
These light shadows and reflections class 7 questions and answers help students write clear exam responses. Each answer focuses on one concept.
Students should add examples wherever possible. Examples make answers easier to understand and score.
Q1. Distinguish between luminous and non-luminous objects.
Luminous objects produce their own light. Non-luminous objects do not produce light and are visible by reflection.
Example: The Sun is luminous. The Moon is non-luminous.
Q2. Why can we see objects that do not produce light?
We can see them because light from another source falls on them. The objects reflect this light into our eyes.
Q3. Why can we see a candle through a straight pipe but not a bent pipe?
Light travels in a straight line. A straight pipe allows light to reach the eye, but a bent pipe blocks the path.
Q4. Why does a shifted matchbox hole stop the light spot?
The shifted hole breaks the straight path of light. So light cannot pass through all holes to reach the screen.
Q5. Why does an opaque object form a shadow?
An opaque object blocks light completely. The area behind it receives no light and forms a shadow.
Q6. Can transparent objects form shadows?
Some transparent objects can form very faint shadows. This happens because a small amount of light may still be blocked.
Shadow Formation Class 7 Questions
Shadow formation class 7 questions are important because they test observation and reasoning. Students should know the conditions for a shadow and how its size changes.
A shadow forms only when light is blocked. The shape, size, and darkness of a shadow depend on the object, screen, and light source.
Q1. What is needed to form a shadow?
A light source, an opaque object, and a screen are needed to form a shadow.
Q2. What happens if the screen is removed?
No visible shadow is seen. A screen is needed for the shadow to appear.
Q3. What happens if the light source is switched off?
No shadow forms because light is necessary for shadow formation.
Q4. Why do opaque objects form dark shadows?
Opaque objects do not allow light to pass through them. So they create a dark region on the screen.
Q5. Do shadows show the colour of the object?
No. Shadows do not show the colour of the object. They show only the dark outline.
Q6. What happens when an object moves closer to the torch?
The shadow becomes larger because the object blocks a wider region of light.
Q7. What happens when an object moves closer to the screen?
The shadow becomes smaller and sharper.
Q8. Why is a bird’s shadow not visible when it flies high?
The shadow spreads over a large area and becomes faint. When the bird flies lower, the shadow becomes darker.
Plane Mirror Class 7 Questions and Answers
Plane mirror class 7 questions and answers mainly test reflection and image properties. Students should remember that a plane mirror forms a virtual image.
The image in a plane mirror looks upright but reversed left to right. It cannot be obtained on a screen.
Q1. What is a plane mirror?
A plane mirror is a flat mirror that forms a clear image by reflection.
Q2. What type of image is formed by a plane mirror?
A plane mirror forms an erect, virtual, same-size, and laterally inverted image.
Q3. Can a plane mirror image be obtained on a screen?
No. A plane mirror image is virtual, so it cannot be obtained on a screen.
Q4. What is the relation between object distance and image distance?
The image appears as far behind the mirror as the object is in front of it.
Q5. If an object is 4 cm in front of a plane mirror, where is the image?
The image appears 4 cm behind the mirror.
Q6. What happens when you move closer to a plane mirror?
Your image also appears closer to the mirror. The image distance remains equal to the object distance.
Lateral Inversion Class 7 Questions
Lateral inversion class 7 questions are common in exams because they connect mirrors with real life. The ambulance example is the most important one.
Lateral inversion means the left side appears as the right side in a plane mirror. The image does not turn upside down.
Q1. What is lateral inversion?
Lateral inversion is the left-right reversal seen in a plane mirror image.
Q2. What happens when you raise your left hand in front of a mirror?
The image appears to raise its right hand.
Q3. Why is AMBULANCE written in reverse on an ambulance?
It is written in reverse so drivers can read it correctly in their rear-view mirrors.
Q4. Do all letters look reversed in a mirror?
No. Some letters look the same because they are vertically symmetrical.
Q5. Which capital letters may look the same in a plane mirror?
Letters such as A, H, I, M, O, T, U, V, W, X, and Y may look the same.
Pinhole Camera Questions and Answers
A pinhole camera shows that light travels in a straight line. It forms a real image on a screen.
This topic is important because it compares mirror images with pinhole camera images.
Q1. What is a pinhole camera?
A pinhole camera is a simple device with a tiny hole and a screen. Light passes through the hole to form an image.
Q2. Why does a pinhole camera form an inverted image?
Light travels in straight lines. Rays from the top of the object reach the lower part of the screen, and rays from the bottom reach the upper part.
Q3. Does a pinhole camera show correct colours?
Yes. A pinhole camera shows the correct colours, but the image is upside down.
Q4. How is a pinhole camera image different from a mirror image?
A pinhole camera forms an inverted real image on a screen. A plane mirror forms an erect virtual image that cannot be obtained on a screen.
Q5. Why is a dark cloth used while viewing a pinhole camera image?
A dark cloth blocks extra light. This makes the image on the screen clearer.
Class 7 Science Chapter 11 Question Answer Practice
This class 7 science chapter 11 question answer section helps students revise the full chapter in one place. These questions are suitable for quick written practice.
Students should write answers in simple points. This keeps answers clear and exam-friendly.
Q1. Name two natural sources of light.
The Sun and stars are natural sources of light.
Q2. Name two artificial sources of light.
An electric bulb and a candle are artificial sources of light.
Q3. Give one example each of transparent, translucent, and opaque materials.
Clear glass is transparent, tracing paper is translucent, and cardboard is opaque.
Q4. What type of object forms the darkest shadow?
An opaque object forms the darkest shadow.
Q5. What is reflection?
Reflection is the bouncing back of light from a shiny surface.
Q6. Why is the Moon visible at night?
The Moon reflects sunlight, so it appears bright at night.
Q7. What is a periscope?
A periscope is a device that uses two plane mirrors to see objects not directly visible.
Q8. What is a kaleidoscope?
A kaleidoscope is a device that uses mirrors to form colourful patterns through multiple reflections.
Light Shadows and Reflections MCQ Class 7
These light shadows and reflections mcq class 7 questions help students revise facts quickly. They also improve accuracy in objective exams.
Q1. Which of these is a luminous object?
a) Moon
b) Mirror
c) Star
d) Book
Answer: c) Star
Q2. The Moon is visible because it:
a) produces its own light
b) reflects sunlight
c) absorbs light
d) blocks light
Answer: b) reflects sunlight
Q3. Light travels in:
a) curved lines
b) circular paths
c) straight lines
d) zigzag paths
Answer: c) straight lines
Q4. Which material forms the darkest shadow?
a) Transparent
b) Translucent
c) Opaque
d) Clear glass
Answer: c) Opaque
Q5. A shadow needs:
a) only a screen
b) only a mirror
c) light source, opaque object, and screen
d) only an object
Answer: c) light source, opaque object, and screen
Q6. The image in a plane mirror is:
a) inverted
b) laterally inverted
c) always enlarged
d) always smaller
Answer: b) laterally inverted
Q7. A pinhole camera forms an image that is:
a) erect
b) inverted
c) laterally inverted only
d) invisible
Answer: b) inverted
Q8. A periscope uses:
a) one lens
b) two plane mirrors
c) three bulbs
d) one pinhole
Answer: b) two plane mirrors
Q9. Which material allows partial light to pass through?
a) Transparent
b) Translucent
c) Opaque
d) Wooden
Answer: b) Translucent
Q10. Which object reflects light clearly?
a) Mirror
b) Cardboard
c) Cloth
d) Brick
Answer: a) Mirror
Experiment-Based Questions from Chapter 11
Experiment-based questions test whether students understand the activity and its conclusion. These questions are important for 2026 school exams.
Students should mention the observation first. Then they should explain the reason clearly.
Q1. What does the matchbox hole activity prove?
It proves that light travels in a straight line. Light reaches the screen only when the holes are aligned.
Q2. What does the straight pipe activity prove?
It proves that light cannot bend through a pipe. We see the flame only through a straight pipe.
Q3. Why is a dark room used in material-testing activities?
A dark room makes the torchlight easy to observe. It also prevents other light from disturbing the result.
Q4. What happens when thick cloth is placed before a torch?
The light does not pass through. A dark shadow forms because thick cloth is opaque.
Q5. What does the shiny steel plate activity show?
It shows reflection of light. The plate changes the direction of sunlight.
Q6. Why are two shadows formed when two torches are used?
Each torch acts as a separate light source. So each torch forms its own shadow.
Q7. What does the pinhole camera activity prove?
It proves that light travels in straight lines. This straight-line travel forms an inverted image.
Light Shadows and Reflections Extra Questions and Answers
These light shadows and reflections extra questions and answers help students practise application-based thinking. They are useful for high-scoring answers.
Students should connect each answer with the correct concept. This makes answers stronger and less generic.
Q1. Why does a shadow become longer in the morning and evening?
The Sun is lower in the sky during morning and evening. Light falls at a slant, so shadows become longer.
Q2. Why is a shadow shortest around noon?
The Sun is almost overhead around noon. Light falls more vertically, so the shadow becomes short.
Q3. Why does a plane mirror image not appear on a screen?
A plane mirror forms a virtual image. Virtual images cannot be caught on a screen.
Q4. Why does a mirror show left-right reversal but not top-bottom reversal?
A plane mirror reverses the direction perpendicular to its surface. This makes left and right appear interchanged to the observer.
Q5. Why does a kaleidoscope form many patterns?
A kaleidoscope uses multiple reflections. When coloured pieces move, new symmetrical patterns form.
Q6. Why does a periscope need two mirrors?
Two mirrors change the direction of light twice. This helps the viewer see objects above or beyond an obstacle.
Q7. Why does a translucent object form a faint shadow?
A translucent object allows some light to pass through. So the shadow is lighter than the shadow of an opaque object.
Most Important Questions from Chapter 11 for 2026 Exams
Use this section for final revision. These questions cover the concepts most likely to appear in exams.
Q1. Differentiate between luminous and non-luminous objects.
Q2. How do the matchbox and pipe activities prove that light travels straight?
Q3. Differentiate between transparent, translucent, and opaque materials.
Q4. State the three conditions needed for shadow formation.
Q5. Why does changing the colour of an object not change its shadow?
Q6. How does shadow size change when the object moves closer to the torch?
Q7. Write four properties of an image formed by a plane mirror.
Q8. What is lateral inversion? Give one example.
Q9. Why is AMBULANCE written in reverse on the front of an ambulance?
Q10. Why is the image in a pinhole camera inverted?
Q11. Compare a plane mirror image with a pinhole camera image.
Q12. What is a periscope? Where is it used?