We recommend using aĪuthors: Paul Peter Urone, Roger Hinrichs Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book uses the This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission. For electromagnetic waves, this means intensity can be expressed as I ave c0E2 0 2 I ave c 0 E 0 2 2, where Iave is the average intensity in W/m 2, and E0 is the maximum electric field strength of a continuous sinusoidal wave. We will pursue interference patterns elsewhere in this text. The energy carried by any wave is proportional to its amplitude squared. Figure 16.45 shows what this interference might look like. The larger the displacement x x size 12, other places where the intensity is zero, and others in between. More quantitatively, a wave is a displacement that is resisted by a restoring force. Large ocean breakers churn up the shore more than small ones. amplitude The amplitude of a sound wave can be quantified in several ways, all of which are a measure of the maximum change in a quantity that occurs when the wave is propagating through some region of a medium. Loud sounds have higher pressure amplitudes and come from larger-amplitude source vibrations than soft sounds. Large-amplitude earthquakes produce large ground displacements. The amount of energy in a wave is related to its amplitude. Ultrasound is used for deep-heat treatment of muscle strains. Loud sounds pulverize nerve cells in the inner ear, causing permanent hearing loss. Earthquakes can shake whole cities to the ground, performing the work of thousands of wrecking balls. Area of the cross-section, A 20 ×10 6 m 2. The energy of some waves can be directly observed. Calculate the intensity of a wave whose power is 20 KW, and the area of cross-section is 20 x 106 m2. (credit: Petty Officer 2nd Class Candice Villarreal, U.S. The Richter scale rating of earthquakes is related to both their amplitude and the energy they carry. the number of photons incident on the surface per second per unit area, and f is the frequency of the light. Waves can also be concentrated or spread out. For example, the longer deep-heat ultrasound is applied, the more energy it transfers. The energy effects of a wave depend on time as well as amplitude. Figure 16.44 The destructive effect of an earthquake is palpable evidence of the energy carried in these waves. does not depend on the light intensity, although the total number of electrons does depend on intensity (rather unusual). In fact, a wave’s energy is directly proportional to its amplitude squared because.

Intensity of light frequency equation