Question
Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is 2.5 × 1015, calculate the energy of the source.
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Solution
Frequency of radiation (ν),
`v = 1/(2.0 xx 10^(9))`
`v = 5.0 xx 10^8 s^(-1)`
Energy (E) of source = Nhν
Where,
N = number of photons emitted
h = Planck’s constant
ν = frequency of radiation
Substituting the values in the given expression of (E):
E = (2.5 × 1015) (6.626 × 10–34 Js) (5.0 × 108 s–1)
E = 8.282 × 10–10 J
Hence, the energy of the source (E) is 8.282 × 10–10 J.
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Reference Material
Solution for question: Lifetimes of the Molecules in the Excited States Are Often Measured by Using Pulsed Radiation Source of Duration Nearly in the Nano Second Range Calculate the Energy of the Source concept: Bohr'S Model for Hydrogen Atom. For the courses CBSE (Science), CBSE (Science)