You are asked to design a detection system for human beings (or animals) in darkness, using infrared detection. If human beings are at a temperature of about 310 K, what would need to be the wavelength of peak sensitivity of your equipment or cameras (1 μm = 10^-6 m)? (Hint: Use Wien's law.) A)9.35 μm B)0.935 μm C)0.00094 μm or 0.94 nm D)90 μm

Question

Quizplus · Accepted Answer

According to Wien's Law, the wavelength of peak intensity for a body at a temperature of 310 K would be:
λmax = 2.898 x 10^-3 mK / T
= 2.898 x 10^-3 mK / 310 K
= 9.35 μm
Therefore, the best choice is A, 9.35 μm.

You Are Asked to Design a Detection System for Human