Exam-style question
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What happens to the peak wavelength of black-body radiation as the temperature of the body increases?.
- A.It increases.
- B.It decreases.
- C.It remains constant.
- D.It fluctuates.
Model answer
What a good answer should say
- It decreases.
Explanation
Why this works
According to Wien's law, the peak wavelength is inversely proportional to the temperature. As temperature increases, the peak wavelength decreases, indicating that hotter bodies emit radiation at shorter wavelengths.
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