Figure 1
-If the typical temperature of a red giant is 3000 K, at what wavelength is its radiation the brightest? Use the electromagnetic spectrum in Figure 1 to help you answer this question.
A) 1 $\mu$m-infrared wavelengths
B) 1 $\mu$m-red visible wavelengths
C) 20 $\mu$m-infrared wavelengths
D) 20 $\mu$m-red visible wavelengths
E) 700 nm-red visible wavelengths

Question

Figure 1
-If the typical temperature of a red giant is 3000 K, at what wavelength is its radiation the brightest? Use the electromagnetic spectrum in Figure 1 to help you answer this question.
A) 1 $\mu$m-infrared wavelengths 
B) 1 $\mu$m-red visible wavelengths 
C) 20 $\mu$m-infrared wavelengths 
D) 20 $\mu$m-red visible wavelengths 
E) 700 nm-red visible wavelengths

Quizplus · Accepted Answer

Using Wien's Law, the peak wavelength λ_max = b/T, where b is Wien's constant (approximately 2.897 x 10^-3 m K). For T = 3000 K, λ_max ≈ 966 nm, which is in the infrared range.

Figure 1 -If the Typical Temperature of a Red Giant μ\muμ

Figure 1
-If the Typical Temperature of a Red Giant $\mu$