We consider the radiation emitted by the human body. Which one of the following statements is true? (a) The radiation emitted is in the infra-red region (b) The radiation emitted only during the day (c) The radiation is emitted during the summers and absorbed during the winters (d) The radiation emitted lies in the ultraviolet region and hence is not visible

Answer: (a). Human body is at about 310 K. Wien's law: λm = b/T = 2.9×10⁻³310 ≈ 9.4, which is infrared. A body emits at all times, day or night, summer or winter. So the answer is (a) infra-red region.

We consider the radiation emitted by the human body. Which one of the… | NEET 2003 (AIPMT)

Q36NEET 2003 · AIPMTEasy

Electromagnetic Spectrum & Atmosphere

We consider the radiation emitted by the human body. Which one of the following statements is true?

Show answer and solution

Answer: (a)

Human body is at about $310\ \text{K}$ .
Wien's law: $\lambda_m = \dfrac{b}{T} = \dfrac{2.9\times10^{-3}}{310} \approx 9.4\ \mu\text{m}$ , which is infrared.
A body emits at all times, day or night, summer or winter.
So the answer is (a) infra-red region.

Report a mistake

Electromagnetic Spectrum & Atmosphere question from NEET 2003 (AIPMT)

More questions on Electromagnetic Spectrum & Atmosphere