TERM	DEF	EX	DRW	DESC EX
Vacuum	X	X
Trough	X		X
Amplitude	X		X
Wavelength	X		X
Frequency	X	X		X
Hertz	X	X
Transverse Wave	X	X	X	X
Compression	X		X	X
Rarefaction	X		X	X
Compressional Wave	X	X	X	X
Refraction	X		X
Reflection	X		X
Polarized	X
Interference	X	X	X	X
Electromagnetic Wave	X	X
EM Spectrum			X	X