What is the largest value you can find within the image of the sun? Let’s call these “Data Numbers” or DN value.Comment on what you estimate is your measurement accuracy. How many significant figures are meaningful? (In other words, can you measure the diameter to an accuracy of one pixel? One tenth of a pixel? One hundredth of a pixel? None of these?)How much fainter in DN units is the sunspot than its surroundings?Repeat your measurement of the Sun’s diameter several times and post your average value of the diameter in kilometers on the Blog. Include a comment about sig figs.
Describe the general nature of the sun's surface around the location of this sunspot.
37812 DN; It is fairly accurate. About 1/10 pixel accurate; 0.000690 pixels/km; it is brighter here than most other places around it
ReplyDeleteMeasure the diameter of the sun and then compare with the actual diameter.
ReplyDeleteWe can measure to half a pixel, so there are only four significant numbers (967.5 and 1392000, the zeros don't count).
ReplyDeleteAVERAGE=1388171
If there are only four significant figures, why does your average contain seven significant figures?
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ReplyDelete(correction)
ReplyDeleteAVERAGE=1388000
Images can be measured to 1/10th of a pixel. Therefore, there are 10 significant figures. My average result was 1397924.156
ReplyDelete(Correction) 4 significant figures, AVERAGE=1397000
Delete(correction)
ReplyDeleteAVERAGE=1409000km
im cufused so if we want the exact number as last time we have to try to mesure in the exact same spot how would we know its in the spot?
ReplyDelete>What is the largest value you can find within the image of the sun?
ReplyDelete5499 DN
>Comment on what you estimate is your measurement accuracy. How many significant figures are meaningful? (In other words, can you measure the diameter to an accuracy of one pixel? One tenth of a pixel? One hundredth of a pixel? None of these?)
See previous posting.
> How much fainter in DN units is the sunspot than its surroundings?
~1,500 DN units
>Post your average value of the diameter in kilometers on the Blog. Include a comment about significant figs.
See previous posting.
>On the Blog describe the general nature of the Sun’s surface around the location of this sunspot.
The Sun's surface has lower DN values as it approaches the sunspot.
oooo ok well my averge is 1402000 km
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