JEE Advanced 2014 Paper 2 Physics Q8

Physics · Atoms & Spectra

Problem

\lambda_{\mathrm{Cu}}

is the wavelength of the

K_\alpha

X-ray line of copper (atomic number 29) and

\lambda_{\mathrm{Mo}}

is the wavelength of the

K_\alpha

X-ray line of molybdenum (atomic number 42), then the ratio

\lambda_{\mathrm{Cu}}/\lambda_{\mathrm{Mo}}

is close to