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Wave Motion

ICSE · Class 11 · Physics

Quick revision notes for Wave Motion — ICSE Class 11 Physics. Key concepts, formulas, and definitions for last-minute revision.

60 questions38 flashcards5 concepts

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A comparison showing the key differences between mechanical waves (requiring a medium, e.g., sound, water waves) and electromagnetic waves (not requiring a medium, e.g., light, radio waves). Include e
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Key Topics to Revise

1

1. Mechanical Waves and Basic Ideas

  • A mechanical wave is a disturbance that travels through a material medium with definite speed without changing its form.
  • Mechanical waves transmit energy and momentum, not the matter.
  • The transmission is possible because of elasticity and inertia of the medium.
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2. Speed of Wave Motion in Solids, Liquids and Strings

  • Mechanical waves can be transverse or longitudinal.
  • Transverse waves travel in solids only.
  • Longitudinal waves travel in solids, liquids and gases.
3

3. Newton’s Formula and Laplace’s Correction

  • Newton assumed that sound propagation in gases is isothermal.
  • Under this assumption, Boyle’s law gives isothermal bulk modulus BT = P.
  • Newton’s formula for the speed of sound in gases is v = √(P/ρ).
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4. Variation of Speed of Sound in Air

  • At constant temperature, pressure change does not affect the speed of sound in a gas.
  • At constant temperature, P/ρ remains constant.
  • Speed of sound in a gas is directly proportional to the square root of absolute temperature.

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Full Notes

Key Concepts

Mechanical waves are disturbances that moveTransverse waves travel in solids onlyThe speed of transverse waveThe speed of longitudinal wavesNewton assumed that sound propagation

Frequently Asked Questions

What are the important topics in Wave Motion for ICSE Class 11 Physics?
Wave Motion covers several key topics that are frequently asked in ICSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Wave Motion — ICSE Class 11 Physics?
Understand the core concepts first, then work through the 60 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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