## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

We can write the equation for the peak wavelength at a given temperature $T$: $\lambda = \frac{2.9\times 10^6~nm~K}{T}$ We can see that if $T$ decreases, then the peak wavelength $\lambda$ increases. Therefore, if the plate is cooled, the peak of maximum radiated intensity shifts toward longer wavelengths.