The value of Wien's constant is:
Correct answer: A. 2.90 x 10^-3 mK
- A. 2.90 x 10^-3 mK
- B. 3.34 x 10^-4 mK
- C. 4.22 x 10^-7 mK
- D. 3.42 x 10^-8 mK
Explanation
Wien's Law states that the product of the wavelength corresponding to the maximum intensity of radiation and the temperature of the body in Kelvin is a constant, known as Wien's constant. The correct value of this constant is approximately 2.897 x 10-3 mK. This relationship helps determine the peak wavelength of radiation emitted by a blackbody at any given temperature. Option A correctly reflects this value. The other options are incorrect as they suggest values that are either too small or not relevant to Wien's constant.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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
Solar energy at normal incidence outside the earth's atmosphere is about:
LASER is a device which can produce:
If a particle of mass 5.0 mg moves with the speed of 8.0 m/sec, then the de-Broglle's wavelength will be:
The life time of an electron in an excited state is about 10-8 s. What is its uncertainty in energy during this time?
The weight of an electron is:
Which one of the following gases is the lasing or active medium in the laser tube?