Exam-style question
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How does the peak wavelength of a star's radiation change as its temperature 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, as the temperature of a star increases, the peak wavelength of its emitted radiation decreases. This means hotter stars emit radiation at shorter wavelengths.
Common mistake
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