a and b 
Day 
Pay 
Po 
NOTATION OF MAJOR SYMBOLS 
pressure coefficients of index of refraction for water 
velocity of sound in water 
a distance r' - r 
mass per upit area of the plate, Wa Pi 
average index of refraction of that section of the shock wave being 
investigated 
index of refraction of sea water at sero pressure 
pressure at a distance x and at a time t 
average pressure of that section of the shock wave being investigated 
peak pressure of original shook front 
P/P, 
true radial distance from center of charge to intersection of a pair 
of grid lines in the optical distortion discussion, also 
radial distance from center of plate to diffracted shock front in 
cavitation theory 
apparent radial distance from center of charge to intersection of a pair 
of grid lines 
Gateeeraee radial eeetor ft a tant ts-1Dp) 
2 
radius of bubble or particle 
inside radius of pipe and/or radius of the diaphragm (or "plate") 
shock wave radius 
radius of cavitation region 
outside radius of pipe 
radius of steel plate 
interfacial tension between water and the particles 
time measured from the time the original wave strikes the plate 
time corresponding to x, (calculated) 
interval of time between impact of shock wave on plate and time of 
photograph 
t/e 
instantaneous velocity of the plate 
*Page where symbol is first used 
& B 
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