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Luminosity can also be given in terms of the astronomical magnitude system: the absolute bolometric magnitude (M bol) of an object is a logarithmic measure of its total energy emission rate, while absolute magnitude is a logarithmic measure of the luminosity within some specific wavelength range or filter band.
The luminous flux accounts for the sensitivity of the eye by weighting the power at each wavelength with the luminosity function, which represents the eye's response to different wavelengths. The luminous flux is a weighted sum of the power at all wavelengths in the visible band. Light outside the visible band does not contribute.
set terminal svg font "Bitstream Vera Sans,12" size 600, 400 set output "CIE_1951_scotopic_luminosity_function.svg" set xrange [380: 700] set yrange [0: 1] set xtics axis nomirror set ytics axis nomirror set key off set border 3 plot "scvle_1.txt" using 1: 2 \ with line linetype rgbcolor "blue" linewidth 2
The 'bathtub' refers to the shape of a line that curves up at both ends, similar in shape to a bathtub. The bathtub curve has 3 regions: The first region has a decreasing failure rate due to early failures. The middle region is a constant failure rate due to random failures. The last region is an increasing failure rate due to wear-out failures.
S represents the light source, while r represents the measured points. The lines represent the flux emanating from the sources and fluxes. The total number of flux lines depends on the strength of the light source and is constant with increasing distance, where a greater density of flux lines (lines per unit area) means a stronger energy field ...
Winston Churchill was so enamored with bathtubs that he routinely took two baths per day (with the water temperature set at a precise 98 degrees) and made many of his most important decisions ...
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