Planck's quantum theory states that energy is emitted or absorbed
Correct answer: B. in discrete packets whose energy is proportional to frequency
- A. continuously in any amount
- B. in discrete packets whose energy is proportional to frequency
- C. only as heat
- D. in packets whose energy is proportional to wavelength
Explanation
Planck proposed that radiation is emitted in quanta of energy E equal to h times the frequency, where h is Planck's constant. Since frequency and wavelength are inversely related, energy is inversely proportional to wavelength, which is why the last option is wrong rather than merely imprecise. The quantum idea was what resolved the black body radiation problem that classical physics could not.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Planck's Quantum Theory
Planck's quantum theory states that energy is emitted or absorbed in discrete packets called quanta, with each packet having energy E = hν. It covers the meaning of Planck's constant, the relationship between frequency and wavelength, and how quantisation differs from the classical continuous model of energy.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, 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 Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.