Physics - Heat & Thermo Question with Solution | TestHub

Two spherical black-bodies A and B, having radii ${\mathrm{r}}_{\mathrm{A}}$ and ${\mathrm{r}}_{\mathrm{B}}$, where ${\mathrm{r}}_{\mathrm{B}}=2{\mathrm{r}}_{\mathrm{A}}$ emit radiations with peak intensities at wavelengths 400 nm and 800 nm respectively. If their temperature are ${\mathrm{T}}_{\mathrm{A}}$ and ${\mathrm{T}}_{\mathrm{B}}$ respectively in Kelvin scale, their emissive powers are ${\mathrm{E}}_{\mathrm{A}}$ and ${\mathrm{E}}_{\mathrm{B}}$ and energies emitted per second are ${\mathrm{P}}_{\mathrm{A}}$ and ${\mathrm{P}}_{\mathrm{B}}$ then: