- Exam
- JEE Main
- Year
- 2023
- Date
- 10 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Thermodynamics (C)
JEE Main 2023 · 10 April · Morning Shift · Chemistry · Thermodynamics (C)
The number of incorrect statement/s about the black body from the...
The number of incorrect statement/s about the black body from the following is______
(A) Emit or absorb energy in the form of electromagnetic radiation.
(B) Frequency distribution of the emitted radiation depends on temperature.
(C) At a given temperature, intensity vs frequency curve passes through a maximum value.
(D) The maximum of the intensity vs frequency curve is at a higher frequency at higher temperature compared to that at lower temperature.
Correct answer
0
Step-by-step solution
A black body is an idealised object that absorbs all the radiation that falls on it and emits radiation over a broad range of frequencies.
Black bodies emit and absorb energy in the form of electromagnetic radiation.
The frequency distribution of the emitted radiation from a black body depends on its temperature and is given by Planck's law.
At a given temperature, the intensity vs frequency curve for a black body radiation passes through a maximum value. This frequency is known as the peak frequency or the frequency of maximum emission.
At higher temperatures, the peak frequency of the black body radiation shifts towards higher frequencies (shorter wavelengths). This means that the maximum of the intensity vs frequency curve is at a higher frequency at higher temperature compared to that at lower temperature.