Physics

Problem

Two spherical blackbodies A and B have radii

R_A

and

R_B

and peak-emission wavelengths

\lambda_A

and

\lambda_B

, respectively. Write an expression, in simplest form, for the ratio of their luminosities

L_A/L_B

in terms of

R_A,\,R_B,\,\lambda_A,

and

\lambda_B