Light: Shadows and | Class 7 Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 2 min read
Light: Shadows and – this guide gives you a concise, exam-ready overview of Light: Shadows and from Class 7 Science, written by ConceptScroll editors and reviewed against the latest NCERT textbook.
Light: Shadows and Reflections
This introductory section sets the context for the chapter by narrating Keshav's experience during his summer vacation in the Western Ghats of Maharashtra. The natural environment filled with forests, fresh air, streams, and birdsong introduces the theme of natural light phenomena. The highlight is the mesmerizing sight of fireflies flashing their own light at night, which introduces the concept of bioluminescence and natural sources of light. The discussion about the decreasing number of fireflies due to environmental factors like light pollution, deforestation, and tourism connects science with societal issues. As Keshav travels back, observing moonlight and vehicle headlights, he questions the nature of light sources, leading to the fundamental inquiry: which objects produce their own light, and does light travel in a straight line? This narrative effectively motivates the study of light, shadows, and reflections by linking everyday observations with scientific concepts.
📊 Diagram: No specific diagrams in this introductory section; the narrative is supported by descriptive imagery of the natural environment and light phenomena.
🔗 Connection: Leads to the next section 'Sources of Light' where natural and artificial sources of light are discussed in detail.
Frequently asked questions
Which of the following are luminous objects? - Mars, Moon, Pole Star, Sun, Venus, Mirror
Luminous objects are those that emit their own light. Among the given objects, the Sun is a luminous object because it emits its own light. Mars, Moon, Pole Star, Venus, and Mirror do not emit their own light; they reflect light from other sources.
Match the items in Column A with those in Column B. Column A | Column B Pinhole camera | Blocks light completely Opaque object | The dark region formed behind the object Transparent object | Forms an inverted image Shadow | Light passes almost completely through it
Correct matching is:
- Pinhole camera: Forms an inverted image
- Opaque object: Blocks light completely
- Transparent object: Light passes almost completely through it
- Shadow: The dark region formed behind the object
Sahil, Rekha, Patrick, and Qasima are trying to observe the candle flame through the pipe as shown in Fig. 11.16. Who can see the flame?
Only the person who is looking directly along the line of sight through the pipe can see the candle flame. The pipe restricts the light rays to travel straight, so only the observer aligned with the pipe can see the flame.
Look at the images shown in Fig. 11.17 and select the correct image showing the shadow formation of the boy.
The correct image showing the shadow formation of the boy is option (b). This image correctly represents the shadow formed behind the boy when light is blocked by him.
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