1.7.8

Intensity

Test yourself

Intensity of Progressive Waves

The intensity of any wave follows the inverse square law.

Illustrative background for Inverse square lawIllustrative background for Inverse square law ?? "content

Inverse square law

  • A physical quantity follows an inverse square law if it is proportional to the reciprocal of the distance squared.
  • The intensity of a wave II is one such quantity, which can be written as:
    • I=kd2I = \frac{k}{d^2}
  • Where dd is the distance from the wave source and kk is the constant of proportionality.
Illustrative background for Intensity and powerIllustrative background for Intensity and power ?? "content

Intensity and power

  • By definition, the intensity (I) of any wave is the time-averaged power (P) it transfers per area (A) through some region of space.
  • The units of intensity are therefore Watts per square metre (Wm-2).

Jump to other topics

1Principles of Science I

1.1Structure & Bonding

1.2Properties of Substances

1.3Cell Structure & Function

1.4Cell Specialisation

1.5Tissue Structure & Function

1.6Working with Waves

1.7Waves in Communication

2Practical Scientific Procedures and Techniques

3Science Investigation Skills

4Principles of Science II

4.1Extracting Elements

4.2Relating Properties to use of Substances

4.3Organic Chemistry

4.4Energy Changes in Industry

4.5The Circulatory System

4.6Ventilation & Gas Exchange

4.7Urinary System

4.8Cell Transport

4.9Thermal Physics

4.10Materials

4.11Fluids

5Contemporary Issues in Science

Unlock your full potential with Seneca Premium

  • Unlimited access to 10,000+ open-ended exam questions

  • Mini-mock exams based on your study history

  • Unlock 800+ premium courses & e-books

Get started with Seneca Premium