Question

A two-dimensional crystal has a rectangular unit cell, with spacings between the centers of the atoms of 0.5 nm in one direction (e.g., the x direction), and 0.4 nm in the other direction (e.g., the y direction). Presuming that the crystal has 1000 unit cells in each direction, sketch a representative portion of the reciprocal lattice on a scale drawing, showing the dimensions, units, and directions (i.e., kx and ky)

Answer 1

So directly the cell density value in a rectangle is:

$5*10^{17} cells/cm^{2}$

In this exercise, we must first calculate the area of ​​the rectangle, remembering that you need to convert from nm to cm is:

$A=B*H\\A=(0.4*10^{-7})*(0.5*10^{-7})= 2*10^{-15}$

Next, let's calculate the density from the calculated area:

$\frac{N}{A} = \frac{1000}{2*10^{-15} } = 5*10^{17}$

In this way, the calculation represents that there is:

$5*10^{17} cells/cm^{2}$

Learn more: brainly.com/question/18320053