A metal sphere behaves like a blackbody whose emission spectrum peaks at 2.0 m when…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

A metal sphere behaves like a blackbody whose emission spectrum peaks at 2.0

\mu

m when its surface temperature is 1200 K. After cooling, its temperature is 800 K. Which value is closest to the new peak wavelength? (a)

1.3\,\mu\text{m}

(b)

4.5\,\mu\text{m}

(c)

3.0\,\mu\text{m}

(d)

2.0\,\mu\text{m}