When the temperature of a black body is lowered, the wavelength associated to the maximum intensity
Correct answer: C. shifts to the longer wavelength.
- A. becomes zero.
- B. remains the same.
- C. shifts to the longer wavelength.
- D. shifts to the shorter wavelength.
Explanation
When the temperature of a black body is lowered, according to Wien's displacement law, the wavelength associated with the maximum intensity shifts to a shorter wavelength. This is because as the temperature decreases, the peak of the black body radiation spectrum moves towards shorter wavelengths. The other options are incorrect because the wavelength does not become zero, remain the same, or shift to a longer wavelength when the temperature is lowered.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Quantum Theory and Radiation questions
The Heisenberg uncertainty principle is related to a particle's
A blacksmith is heating an iron axe on a high degree burner. While heating the axe, he noted that different colours are produced. Which of the following colours shows the highest temperature of the iron axe?
The given wavelength-energy graph shows the radiation emitted by a blackbody. Which of the following options shows the CORRECT relationship among T1, T2 and T3?
All of the following are the characteristics of an ideal black body EXCEPT that
In the Davison and Germer experiment of wave nature of electrons, the velocity of electronsemitted from the electron gun can be increased between anode and heated filament by
According to Einstein's theory of relativity, gravity is not an ordinary force, but aproperty of