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Syllabus

Sound — Syllabus

ICSE · Class 10 · Physics

What Sound covers in ICSE Class 10 Physics: 4 topics, for the 2026-27 session. Part of the ICSE Class 10 Physics syllabus.

42 questions38 flashcards11 formulas & key relations5 concepts

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A comparison chart highlighting the key differences between light waves and sound waves, including their nature (electromagnetic vs. mechanical), medium requirement, wave type (transverse vs. longitud
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4 Topics · ICSE Class 10 Physics · 2026-27

Topics in Sound

1

1. Sound Waves and Basic Ideas

  • Sound is produced by vibrating bodies.
  • Sound needs a medium for propagation.
  • Sound waves are mechanical and longitudinal in nature.
2

2. Speed of Sound in Air and in Gases

  • Speed of sound in air is 330 m s⁻¹.
  • Speed of light in air is 3 × 10⁸ m s⁻¹.
  • Speed of sound in air depends on temperature and density.
3

3. Reflection of Sound, Echo and Reverberation

  • Reflection of sound occurs when sound waves strike a rigid surface and return to the same medium.
  • Sound obeys the laws of reflection.
  • A smooth surface is not necessary for reflection of sound.
4

4. Uses of Echo: SONAR, RADAR, Ultrasonography and Sound Ranging

  • Bats, dolphins and dogs have a higher upper audible limit than humans and use echo-based sound ranging.
  • Fishermen use ultrasonic waves in water to detect fish distance.
  • SONAR means Sound Navigation And Ranging.

Key Concepts

Central concept: Sound waves and their behavior

Sound wavesWave quantitiesReflection of soundEchoReverberationSpeed of sound in airSound ranging and detectionFree or natural vibrations

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Frequently Asked Questions

What are the important topics in Sound for ICSE Class 10 Physics?
Key topics in Sound include Sound Waves and Basic Ideas, Speed of Sound in Air and in Gases, Reflection of Sound, Echo and Reverberation, Uses of Echo: SONAR, RADAR, Ultrasonography and Sound Ranging. Study these first, then practise questions on each for the ICSE Class 10 board exam.
How should I revise Sound for the ICSE Class 10 board exam?
Learn the core ideas first, then work through the 42 practice questions on Sound. 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.

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All ICSE Class 10 Physics Syllabus

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