9.1.1
Frequency and Wavelength
1801    1802        

9.1.2
Graphical Representation of Waves
1803    1804    1805    

9.1.3
Wave speed
1808    1809    1810   

9.1.4
Wave Intensity
1823    1824    1826    1827    |    1821    1822    1825    1828    1829*   

9.2.1
Phase Relationship
1814    1811    1815    1817 

9.2.2
Phase Relationship in Graphs
1812    1813    |    1816    

9.3.1
Transverse Vs Longitudinal
—-

9.3.2
Sound Wave
1806    

9.3.3
Graphs of Longitudinal Wave
1807       

9.4.1
The Electromagnetic Spectrum
1819    1820   

9.4.2
Polarization
1830    1832    1833   

9.4.3
The Three Polarizer Problem
1831