If wavelength of `K_(alpha)` from Z = 46 is `lambda`, then find out wavelength of `K_(alpha)` from Z = 31.

Explanation

To find the wavelength of the Kα line for an atomic number \( Z = 31 \) given that the wavelength for \( Z = 46 \) is \( \lambda \), we can use Moseley's law. Here’s a step-by-step solution:

### Step 1: Understand Moseley's Law
Moseley's law states that the frequency (\( \nu \)) of the emitted X-ray is related to the atomic number (\( Z \)) of the element. The formula is given by:
\[ \nu = A(Z - B)^2 \]
where \( A \) is a constant and \( B \) is the screening constant. For Kα lines, \( B \) is typically taken as 1.
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