Question
Physics Question on thermal properties of matter
A black body at 1227°C emits radiations with maximum intensity at a wavelength of 5000 Å. If the temperature of the body is increased by 1000°C, the maximum intensity will be observed at :
A
7500 Å
B
1500 Å
C
6000 Å
D
3000 Å
Answer
3000 Å
Explanation
Solution
By using the Wiens displacement rule, mT= b,
we can calculate the following: (5000)(1500)
= (m )(1500+1000), =m = 2500(500)(1500) = 3000Å
Therefore, the correct option is (D): 3000 Å