Planck's quantum theory states that energy is emitted or absorbed
- 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.