If wavelength of `K_(beta)` from an element is 5.4 Å. Calculate wavelength for `K_(alpha)` from the same element.

Explanation

To solve the problem of finding the wavelength for the K_alpha line given the wavelength of the K_beta line, we can follow these steps:

### Step 1: Understand the transitions
The K_alpha line corresponds to the transition from the n=2 energy level to the n=1 energy level, while the K_beta line corresponds to the transition from the n=3 energy level to the n=1 energy level.

### Step 2: Write the formula for the wavelengths
The general formula for the characteristic X-ray wavelengths is given by:

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