Question
A surface is placed perpendicular to a beam of light of constant irradiance ( $l$ ). Suppose that the fraction of the irradiance absorbed by the surface is $\alpha .$ Show that the pressure on the surface is given by $$\mathscr{P}=(2-\alpha) I / c$$
A surface is placed perpendicular to a beam of light of constant irradiance ( $l$ ). Suppose that the fraction of the irradiance absorbed by the surface is $\alpha .$ Show that the pressure on the surface is given by $$\mathscr{P}=(2-\alpha) I / c$$
Answers
$\bullet$ The intensity at a certain distance from a bright light source is 6.00 $\mathrm{W} / \mathrm{m}^{2} .$ Find the radiation pressure (in pascals and in atmospheres) on (a) a totally absorbing surface and (b) a totally reflecting surface.
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Table of Chi-square critical valuesU.YySU.975 0.muI 0,051 0,216 0.484 0.831 1,237 690 180 -700 247 816 404 4109 629 '362U.95 0.004 0.403 0.352 0.711 1.45 1,635 2.167 2733 3,325 940 575 226 892 657| J6|UYIUUU.us 1.841 5,991 7.815 9,468 1L.070 12.592 14,067 15.507 16.919 18,307 19.675 21.026 21162 23,685 4996Uuz5 UI UUJS 5.024 6.,635 7,879 7.378 9.210 10.597 9,148 M345 12.838 1L.I4J 13277 14,860 12.833 15.086 16,750 14.49 16.812 18.548 I6 013 16,475 20.278 17,535 20.090 21,955 19.023 666 23.5
Table of Chi-square critical values U.YyS U.975 0.muI 0,051 0,216 0.484 0.831 1,237 690 180 -700 247 816 404 4109 629 '362 U.95 0.004 0.403 0.352 0.711 1.45 1,635 2.167 2733 3,325 940 575 226 892 657| J6| UYI UU U.us 1.841 5,991 7.815 9,468 1L.070 12.592 14,067 15.507 16.919 18,307 19.675 21.02...
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cmpoweny producing computer components has established that on the average; 4 new employee can assemble N() components per duy alter t days of on-the-job training: 40t given by N(t) = t+2 Find the avcrage rate of change of N(t) from to 5 days (8 pts) Find the instantaneous rate of change of N(t) a...