Index for
Chapter 10
Waves

1. Wave Pulse

• pulse
• medium
• transverse
• longitudinal

2. Frequency

• wave
• period
• frequency
• sinusoidal waves

3. Wavelength

• snapshot
• crests
• troughs
• in phase
• out of phase
• wavelength

4. Wavespeed and The Wave Equation

• wave equation
• $v=\frac{\lambda }{T}$
• $v=\lambda f$

5. Sound

• compression
• rarefaction
• pressure waves
• loudness
• pitch
• fundamental frequency
• overtones

6. Light

• electromagnetic spectrum

7. Wavefronts

• wavefront

8. Interference

• superposition
• constructive interference
• destructive interference
• path length
• $\ell =\frac{L}{\lambda }$
• If $\mathrm{\Delta }\ell$ is an integer, we have constructive interference.
  If $\mathrm{\Delta }\ell$ is an integer plus 0.5, we have destructive interference.

9. Standing Waves

• standing wave
• nodes
• antinodes
• mode
• fundamental frequency
• ${\lambda }_n=\frac{2L}{n}$
• $f_n=\frac{v}{2L}n=n{f}_1$

10. Pipes

11. Doppler Effect

• doppler effect
• If source and observer are moving towards each other, the frequency will increase.
  If source and observer are moving away from each other, the frequency will decrease.
• $f_{obs}=f_{src}\frac{v_w\mp v_{obs}}{v_w\pm v_{src}}$

12. Decibels

• intensity
• sound intensity level
• bels
• decibels
• $\beta =10\mathrm{dB}({\log }_{10}I+12)$
• ${\beta }_N={\beta }_1+10{\log }_{10}N$
• $\beta (r^{\prime })=\beta (r)-20{\log }_{10}\frac{r^{\prime }}{r}$