The black body always _ radiations.
Correct answer: C. Both Options A and B are correct
- A. Emits
- B. Absorbs
- C. Both Options A and B are correct
- D. Reflects
Explanation
A black body absorbs all radiation incident upon it, regardless of wavelength or frequency. This absorption is a fundamental property of black bodies, as they are ideal absorbers of electromagnetic radiation. A black body, by definition, emits radiation across the entire electromagnetic spectrum. This emission is due to the thermal energy possessed by the black body, and it follows the principles of black-body radiation, as described by Planck's law and Stefan-Boltzmann's law.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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.