Luminescence is because of Options: (a) Photons emitted while excited electrons drops down
Answers
Answer:
Concept:
The emission of visible light (light with wavelengths between about 690 and 400 nano metres, corresponding to the region between deep red and deep violet) necessitates excitation energies, the smallest of which is given by Einstein's law, which states that energy (E) equals Planck's constant (h) times the frequency of light (v), or Planck's constant times the velocity of light (c) in a vacuum divided by wavelength (λ).Excitation energy per mole of material varies between 40 kilocalories (for red light), roughly 60 kilocalories (for yellow light), and about 80 kilocalories (for violet light). Electron volt units (one electron volt = 1.6 10^12 erg; the erg is an incredibly small unit of energy) can be used instead of kilocalories, and the photon energy required in the visible area ranges from 1.8 to 3.1 electron volts.
Given:
Luminescence is because of Options:
(a) Photons Emitted While Excited Electrons Drops Down.
Find:
find the correct answer for the given question
Answer:
The answer is option (a) Photons emitted while excited electrons drops down
=> Luminescence is the process of a chemical molecule absorbing light at a specified wavelength (the excitation wavelength) and emitting light at a longer wavelength (the emission wavelength). The term "luminescence" refers to the emission of light that is not caused by a high temperature. As a result, luminescence is defined as the appearance of cold body radiation. This radiation can be a result of a chemical reaction, or it can produce subatomic motions or crystal stress.
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