21bad que 2-D hain kya?
are u getting 0.92?????
it is a 2d picture of unit cell
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7 Answers
21Wat did u take as the relation of Radius of chota sphere and the 4 bigger ones?
1let radius of larger circles be a
area of square = 4a2
combined area of four quarters of larger circles = Î a2
radius of smaller circle = (2√2.a - 2a)/2 = (√2-1)a
=> area of smaller circle = (3-2√2)Πa2
packing fraction = (4-2√2)Πa2/4a2 ≈ 0.92...
21radius of smaller circle = (2√2.a - 2a)/2 = (√2-1)a
kaise ??? ^^^^^^^^
1diagonal of square will be = 2√2.a which is equal to diameter of smaller circle + twice d radius of larger circle...
=> 2√2.a = 2r + 2(a) => r = (√2-1)a