J. H. Webb, "Number of Quanta Required to Form the Photographic Latent Image as Determined from Mathematical Analysis of the H and D Curve. Part II*," J. Opt. Soc. Am. 31, 559-569 (1941)

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Values of D/D_{m} computed from Eqs. (6), (13), and (15) for values of constants, k=0.07,
${r}_{0}={\scriptstyle \frac{1}{16}}$, r_{min}=4, r_{max}=∞. Emulsion III.

Characteristic constants of emulsions I, II, and III as determined experimentally.

Emulsion

Average Grain Size (cm^{2})

Absorption Coefficient

n

I

0.115×10^{−8}

0.55

10

II

0.309×10^{−8}

.52

10

III

0.700×10^{−8}

.65

10

Table VI

Data for the sensitivity distribution function for emulsions I, II, and III calculated from the equation f(r)=α exp [−k(2.3 log r/r_{0})^{2}]. Values of constants α, k, and r_{0} given in Fig. 8.

Values of D/D_{m} computed from Eqs. (6), (13), and (15) for values of constants, k=0.07,
${r}_{0}={\scriptstyle \frac{1}{16}}$, r_{min}=4, r_{max}=∞. Emulsion III.

Characteristic constants of emulsions I, II, and III as determined experimentally.

Emulsion

Average Grain Size (cm^{2})

Absorption Coefficient

n

I

0.115×10^{−8}

0.55

10

II

0.309×10^{−8}

.52

10

III

0.700×10^{−8}

.65

10

Table VI

Data for the sensitivity distribution function for emulsions I, II, and III calculated from the equation f(r)=α exp [−k(2.3 log r/r_{0})^{2}]. Values of constants α, k, and r_{0} given in Fig. 8.