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Revision Notes

Light

ICSE · Class 4 · Science

Quick revision notes for Light — ICSE Class 4 Science. Key concepts, formulas, and definitions for last-minute revision.

45 questions36 flashcards5 concepts

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Key Topics to Revise

1

Sources of Light

  • Light is a form of energy that helps us see objects.
  • Things that give out light are called sources of light.
  • Sources of light can be natural or artificial.
2

Luminous and Non-Luminous Objects

  • Luminous objects give out their own light (e.g., Sun, candle).
  • Non-luminous objects do not give out light (e.g., table, book, Moon).
  • We see non-luminous objects when light reflects off them into our eyes.
3

Properties of Light

  • Light travels in straight lines — this is called rectilinear propagation.
  • Light spreads in all directions from its source.
  • Light can be reflected, refracted, and split into colors.
4

Transparent, Translucent, and Opaque Objects

  • Transparent objects allow all light to pass through (e.g., glass, air).
  • Translucent objects allow some light to pass through (e.g., tracing paper, frosted glass).
  • Opaque objects do not allow any light to pass through (e.g., wood, metal).

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Full Notes

Key Concepts

Things that give out lightLuminous objects produce their own lightLight moves in a straight pathTransparent objects (like glass) let allA shadow forms when an opaque

Frequently Asked Questions

What are the important topics in Light for ICSE Class 4 Science?
Light covers several key topics that are frequently asked in ICSE Class 4 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Light — ICSE Class 4 Science?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and 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.

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