mphys1

# mphys1 - Rework for Practice Introduction to Two-Source...

This preview shows pages 1–2. Sign up to view the full content.

Rework for Practice Introduction to Two-Source Interference Learning Goal: To gain an understanding of constructive and destructive interference. Consider two sinusoidal waves (1 and 2) of identical wavelength , period , and maximum amplitude . A snapshot of one of these waves taken at a certain time is displayed in the figure below. ( Intro 1 figure ) Let and represent the displacement of each wave at position at time . If these waves were to be in the same location () at the same time, they would interfere with one another. This would result in a single wave with a displacement given by . This equation states that at time the displacement of the resulting wave at position is the algebraic sum of the displacements of the waves 1 and 2 at position at time . When the maximum displacement of the resulting wave is less than the amplitude of the original waves, that is, when , the waves are said to interfere destructively because the result is smaller than either of the individual waves. Similarly, when , the waves are said to interfere constructively because the resulting wave is larger than either of the individual waves. Notice that . Alyssa Roland Part A To further explore what this equation means, consider four sets of identical waves that move in the + x direction. A photo is taken of each wave at time and is displayed in the figures below. Rank these sets of waves on the basis of the maximum amplitude of the wave that

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 02/17/2009 for the course PHYS 181 taught by Professor Stephenirons during the Spring '08 term at Yale.

### Page1 / 4

mphys1 - Rework for Practice Introduction to Two-Source...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online