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Chapter 5 of 8
Concept Maps

Light Energy — Concept Maps

ICSE · Class 8 · Physics

4 concept maps of Light Energy for ICSE Class 8 Physics, each also written out as a text outline. Part of the ICSE Class 8 Physics syllabus.

44 questions36 flashcards10 formulas & key relations5 concepts

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A diagram illustrating the concept of apparent depth, showing an object placed at the bottom of a liquid and how it appears to be at a shallower depth when viewed from above due to refraction.
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One of 5 illustrations for Light Energy in Super Tutor — alongside flashcards, concept maps and practice questions.

4 Concept Maps

Comparison of light speeds in different media showing optical density hierarchy

Comparison of light speeds in different media showing optical density hierarchy

The map in words

  • Light Speed in Different Media
    • Air: 3 × 10⁸ m/s
      • Optically Rarest
    • Water: 2.25 × 10⁸ m/s
      • Medium Density
    • Glass: 2 × 10⁸ m/s
      • Optically Densest

Flow showing what happens when light travels from rarer to denser medium

Flow showing what happens when light travels from rarer to denser medium

The map in words

  • Light from Rarer to Denser Medium
    • Air to Water or Air to Glass
      • Light Speed Decreases
        • Light Bends TOWARDS Normal
          • Angle of Refraction r is Less than Angle of Incidence i
            • r < i

Flow showing what happens when light travels from denser to rarer medium

Flow showing what happens when light travels from denser to rarer medium

The map in words

  • Light from Denser to Rarer Medium
    • Water to Air or Glass to Air
      • Light Speed Increases
        • Light Bends AWAY FROM Normal
          • Angle of Refraction r is Greater than Angle of Incidence i
            • r > i

Light Energy

Light Energy

The map in words

  • Light Energy
    • Refraction of Light
    • Speed of Light in Media
    • Refractive Index
    • Effects of Refraction
    • Prism and Dispersion
    • Spherical Mirrors
    • Mirror Terms
    • Ray Diagram Rules

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Frequently Asked Questions

What are the important topics in Light Energy for ICSE Class 8 Physics?
Key topics in Light Energy include Refraction of Light, Effects of Refraction, Prism and Dispersion, Spherical Mirrors. Study these first, then practise questions on each for Class 8 exams.
What do the concept maps for Light Energy show?
The 4 maps show how the ideas in Light Energy connect: Comparison of light speeds in different media showing optical density hierarchy; Flow showing what happens when light travels from rarer to denser medium. Each map is also written out as an outline on this page.
How should I revise Light Energy for Class 8 exams?
Learn the core ideas first, then work through the 44 practice questions on Light Energy. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Light Energy

All ICSE Class 8 Physics Concept Maps

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