Cavitation (Influence of Free Gas Content) 
By combining terms, 
‘ - , > 
vs) oe te aikz u Cop ic3 eicsP (9A) 
where 
ak 
i 
MEN wae at clef 2e)® 
Co oes (22)? (10A) 
2 a2 + (k/2f)2 
E eu tan” (k /2fa) 
i k 2 
rae ot ee + (k/2ay] */22) 
= ee + 
wh See “4 
It should be noted that equation (8A) was evaluated with the assi- 
stance of reference [40] . Thus the complete wave amplitude di- 
stribution in the xX plane, a distance Z away from the object 
plane, cr is 
2 
ik ikp2 /2 -c. p*-ic. ic] (11A 
w (x) Se aes pau cae = J, (kp Lo/Z) -ic,e ee teas it ) 
Since both photographic emulsions and the human eye are square law 
detectors, the quantity actually measuredis w (x) w (x) * the intensi- 
2 oe ae a sin(kp?/2Z) J, (kpbo/Z) + (Lo/p)* I” (kpLo/Z) 
- ela ie sin(c, - Coa} (12A) 
cls c, J, (kpLo/Z)e 2 Pcos(k p2/2Z ie, = c, P*) 
+2 prtcsee 
For photographic emulsions it has been found that after proper ex- 
posure and processing the emulsion density will vary linearly as fol- 
lows, 
1151 
