Two spherical stars $A$ and $B$ emit blackbody radiation. The radius of $A$ is 400 times that of $B$ and $A$ emits $10^4$ times the power emitted from B . The ratio $\left(\frac{\lambda_{\mathrm{A}}}{\lambda_{\mathrm{B}}}\right)$ fo their wavelengths $\lambda_{\mathrm{A}}$ and $\lambda_{\mathrm{B}}$ at which the peaks occur in their respective radiation curves is :