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I'm trying to work out the 'optical' area made up of strands of fibre optics. Each fibre is 0.85mm and I have 100 of them.
I already have an equation of 100 x 0.85 x 0.85 x 3.14 / 4 = 56.716
What I would like to know is:
a) Why do you devide by 4??? (is this something to do with a quadratic circle????)
b) The reason you x 0.85 twice???? Because if it were 1 you would immediatley x 3.14
Many thanks
The formula for the area of a circle is πr², where r is its radius.
0.85 is the diameter, which is double the radius. So the formula is actually π x (0.85/2)², but the 0.85² has been split into two and the two 2's have been combined to make a division by 4. Hopefully that makes sense.
Why did the vector cross the road?
It wanted to be normal.
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