NEET2016Physics-Black Body Radiation
NEET 2016 Physics Wien's Law MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nₘ is U₁, at wavelength 500 nₘ is U₂ and that at 1000 nₘ is U₃. Wien’s constant, b = 2.88 × 10⁶ nmK. Which of the following is correct?
A
U₁ > U₂
B
U₂ > U₁
C
U₁ = 0
D
U₃ = 0
Correct Answer
Option B
Detailed Explanation
Using Wien's displacement law, the peak wavelength is inversely proportional to the temperature. At 1000 nₘ, the energy emitted is negligible compared to the peak wavelength.
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