This MCQ module is based on: Light, Shadows and Reflections
Light, Shadows and Reflections
Chapter 11 at a Glance — Light: Shadows and Reflections
Sources of Light
Natural (Sun, stars, fireflies) or artificial (candle, bulb, torch) — both emit light of their own.Luminous / Non-luminous
Luminous objects produce their own light; non-luminous only reflect it (Moon, book, wall).Transparent
Almost all light passes through (clean glass, water, air).Translucent
Only some light passes through; objects appear blurred (butter paper, frosted glass).Opaque
No light passes through; light is blocked or reflected (wood, metal, stone).Straight-line Travel
Light travels in a straight line in any uniform medium — the rectilinear propagation of light.Shadow
Dark patch formed when light, an opaque object and a screen come together. Always black — just absence of light.Shadow Size
Object near the source → large shadow; object near the screen → small, sharp shadow.Pinhole Camera
Produces an inverted, smaller image of a bright object because light crosses through a tiny hole.Eclipses
Sun–Moon–Earth alignment creates cosmic shadows: solar (Moon between) and lunar (Earth between).Reflection
Bouncing back of light from a smooth surface. Angle of incidence = angle of reflection.Plane Mirror Image
Virtual, erect, same size, equal distance behind, laterally inverted.Periscope
Two plane mirrors at 45° let us look over walls and from submarines.Kaleidoscope
Three mirrors in a triangular tube give ever-changing symmetric colour patterns.Rainbow
Sunlight split by raindrops into seven colours — VIBGYOR.Keyword Dictionary
NCERT Exercises — Solved
Q1. Distinguish between a luminous and a non-luminous object with one example each.
Q2. Classify the following as transparent, translucent or opaque: clear glass, butter paper, wooden door, air, frosted bathroom glass, a thick curtain.
Q3. State the three conditions needed for a shadow to form.
Q4. Why does a shadow always appear black even when the object has a bright colour?
Q5. A boy holds a cardboard cut-out in front of a torch. When he moves the cut-out closer to the torch, what happens to its shadow on the opposite wall? Explain.
Q6. Describe how a pinhole camera forms an image. Why is the image inverted?
Q7. State the two laws of reflection of light. Draw a labelled ray diagram.
Law 1: The angle of incidence is equal to the angle of reflection, \(i = r\).
Law 2: The incident ray, the normal at the point of incidence, and the reflected ray all lie in the same plane.
Q8. List any four properties of the image formed by a plane mirror.
Q9. Why is the word AMBULANCE written in reverse on the bonnet of an ambulance?
Q10. Explain the working of a simple periscope with a clear diagram.
Q11. What is an eclipse? Give the difference between a solar and a lunar eclipse.
Solar eclipse: The Moon comes between the Sun and the Earth, and its shadow falls on the Earth. It occurs on a new-moon day.
Lunar eclipse: The Earth comes between the Sun and the Moon, and Earth's shadow falls on the Moon, making the Moon appear dark or reddish. It occurs on a full-moon night.
Q12. Write the names of the seven colours of a rainbow in the correct order from the outer edge to the inner edge of the arc.
Frequently Asked Questions — Light, Shadows and Reflections — Chapter 11 Exercises
What does the topic 'Light, Shadows and Reflections — Chapter 11 Exercises' cover in Class 7 Science?
The topic 'Light, Shadows and Reflections — Chapter 11 Exercises' is part of NCERT Class 7 Science Chapter 11 — Light: Shadows and Reflections. It covers the key ideas of light, shadows, reflection, mirrors, NCERT exercises, explained through everyday examples, labelled diagrams and hands-on activities drawn from the NCERT Curiosity textbook. Students learn not just definitions but also the reasoning behind each concept so they can answer competency-based questions and assertion–reason items. The lesson helps Class 7 students build a strong base for higher classes by linking each idea to real observations at home, school and in nature, and by preparing them for CBSE school assessments and Olympiads.
Why is 'Light, Shadows and Reflections — Chapter 11 Exercises' important for Class 7 NCERT Science?
'Light, Shadows and Reflections — Chapter 11 Exercises' is important because it builds core scientific thinking that Class 7 students will use throughout middle and secondary school. NCERT Chapter 11 — Light: Shadows and Reflections — introduces light and related ideas that appear again in Class 8, 9 and 10 Science. Mastering this subtopic helps students read labels and safety signs, understand news about science and technology, and perform better in CBSE school exams. The chapter also encourages curiosity and evidence-based thinking — skills that support the National Education Policy (NEP) 2020 focus on conceptual understanding and competency-based learning.
What are the key concepts students should remember from Light, Shadows and Reflections — Chapter 11 Exercises?
The key concepts in 'Light, Shadows and Reflections — Chapter 11 Exercises' for Class 7 Science are: light, shadows, reflection, mirrors, NCERT exercises. Students should be able to define each term in their own words, give at least one everyday example, and explain how the concept connects to other chapters in NCERT Class 7 Science. For example, linking the idea to daily life — in the kitchen, classroom or outdoors — makes revision easier. Writing short notes, drawing labelled diagrams and solving the NCERT in-text and exercise questions for Chapter 11 will help students retain these concepts for unit tests and the annual CBSE examination.
How is Light, Shadows and Reflections — Chapter 11 Exercises taught using activities in NCERT Curiosity Class 7?
NCERT Curiosity Class 7 Science teaches 'Light, Shadows and Reflections — Chapter 11 Exercises' using an inquiry-based approach with Predict–Observe–Explain activities. Students are asked to make a guess first, then perform a simple experiment with safe, easily available materials, and finally explain what they observed. This matches the NEP 2020 focus on learning by doing. For Chapter 11 — Light: Shadows and Reflections — the textbook includes hands-on tasks, labelled diagrams and questions that build Bloom's Taxonomy skills from Remember (L1) to Create (L6). Teachers use these activities, along with competency-based questions (CBQs) and assertion–reason items, to check real understanding rather than rote memorisation.
How should Class 7 students prepare for the Chapter 11 exercises?
To prepare for the Chapter 11 — Light: Shadows and Reflections — exercises in NCERT Class 7 Science, students should first revise the theory in Parts 1–3 and make a short list of definitions and diagrams for light, shadows, reflection, mirrors, NCERT exercises. Next, attempt each exercise question on their own before checking the solution. Pay extra attention to MCQs, assertion–reason questions and short-answer items, as these appear in CBSE competency-based tests. Practising with the NCERT Curiosity textbook, the exemplar questions, and the MyAiSchool practice bank helps Class 7 students score better in unit tests and the annual examination.
How does 'Light, Shadows and Reflections — Chapter 11 Exercises' connect to other chapters of Class 7 Science?
'Light, Shadows and Reflections — Chapter 11 Exercises' connects to many other chapters in NCERT Class 7 Science Curiosity. The ideas of light appear again when students study related topics like heat, light, changes, life processes and Earth-Sun-Moon. For example, understanding this subtopic helps in building mental models for later chapters and for Class 8, 9 and 10 Science. Teachers often use cross-chapter questions in CBSE examinations to test whether students can apply what they learned in Chapter 11 — Light: Shadows and Reflections — to new situations. This integrated approach matches the NEP 2020 and NCF 2023 focus on holistic, competency-based learning.