The X-rays of aluminium ( ) and zinc ( ) have wavelengths and

PHYSICS · Subjective · CBSE · Physics · Atoms · Atoms

Problem

The

K_\alpha

X-rays of aluminium (

Z = 13

) and zinc (

Z = 30

) have wavelengths

887\ \text{pm}

and

146\ \text{pm}

, respectively. Use Moseley's equation

\sqrt{\nu} = a(Z-b)

to find the wavelength of the

K_\alpha

X-ray of iron (

Z = 26