Wilbert Smith Archives Files Box 1130 16 1130-16-p031

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XO. 5 LUMINOUS EFFICIENCY OF METEORS (143° changes with the brightness in such a way that the emission in the red appears to become important for fainter meteors. Ceplecha (1959) has suggested this spectrum change to explain the results on the color index that he obtained by using panchromatic emulsions, which attain maximum sensitivity for a wave- length equal to 6700 A. Davis’ (1963) photo- electric measurements confirmed this sugges- tion. A variation of 7 with brightness was also predicted...