The London, Edinburgh and Dublin philosophical magazine and journal of science . rim of a circular disk whoseradius is large compared to .% t _l_]^^_^^+0-016^% (III.)±R~2 7r2a a a2 As was before remarked, the intensity at the rim approachesi with increasing values of a ; it is, moreover, seen how the fluctuation due to the term ^-^ is negligibly small. By a applying the above formula, the following table was calcu-lated for a>20:— Focal Plane of a Telescope with Circular Aperture. 13 1 a. JR- a. JE- 20 046950-4747048320-4809048300-4846048600-48800-48950-49060-49150-49230-49460-4958 2
The London, Edinburgh and Dublin philosophical magazine and journal of science . rim of a circular disk whoseradius is large compared to .% t _l_]^^_^^+0-016^% (III.)±R~2 7r2a a a2 As was before remarked, the intensity at the rim approachesi with increasing values of a ; it is, moreover, seen how the fluctuation due to the term ^-^ is negligibly small. By a applying the above formula, the following table was calcu-lated for a>20:— Focal Plane of a Telescope with Circular Aperture. 13 1 a. JR- a. JE- 20 046950-4747048320-4809048300-4846048600-48800-48950-49060-49150-49230-49460-4958 250 0-49850-4971049770-49810-49840-49860-49880-49890-49900-4993049950-49960-49960-5000 1 25 300 30 400 35 500 40 600 45 700 50 800 60 900 70 1000 80 1500 90 2000 100 2500 150 3000 00 200 6. Intensity at any Point of the Focal Plane due to aCircular Source of Light. Let the intensity of light be required at any point 0 in thefocal plane of a telescope, where the point O may lie eitherexternal or internal to the image of the circular source (seefigs. 3 and 4). Fig. 3. Fig.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
