- Moseley's law states that the square root of the frequency (√ν) of a characteristic X-ray spectral line is linearly proportional to the atomic number (Z) of the element. - Mathematically, this is expressed as √ν = a(Z - b), where 'a' and 'b' are constants specific to the spectral series. - Squaring both sides gives ν = a²(Z - b)². - For large Z, the constant 'b' is relatively small compared to Z (e.g., b ≈ 1 for the K-series). Therefore, the frequency (ν) is approximately proportional to the square of the atomic number (Z²).
According to Moseley's law the frequency of the spectral line in X-ray spectrum varies as
Asked in TNPSC CS Prelims 2019 · Topic: Nuclear Physics (Basic properties of nuclei: size, shape, charge, mass, spin, magnetic dipole and electric quadrupole moments.)
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