the atomic transition problem. Let E2- E = hw %3D | for two atomic states, u(@) be the radiation density, N be the number of atoms in state 1, and N2 that in state 2. B12 is the Enstein coffeicent for absorption, B1 that transition probability for emission, and A the spontaneous emission coefficient. Find N2/N
the atomic transition problem. Let E2- E = hw %3D | for two atomic states, u(@) be the radiation density, N be the number of atoms in state 1, and N2 that in state 2. B12 is the Enstein coffeicent for absorption, B1 that transition probability for emission, and A the spontaneous emission coefficient. Find N2/N
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![The laboratory operation of a Laser is related to
the atomic transition problem. Let E - E, = ho
for two atomic states, u(@) be the radiation
density, N be the number of atoms in state 1, and
N2 that in state 2. B12 is the Enstein coffeicent for
absorption, B21 that transition probability for
emission, and A the spontaneous emission
coefficient. Find N2/N1
O B12/[A+ B21]
O B1zu(@)/[A + B21u(@)]
O B1zu(@)/A
O B1zu(@)/B21
O Au(@)/B12
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Forbidden transitions and selection rules suggest
that
O a photon has energy
O a photon has mass
O a photon has linear momentum
O a photon has angular momentum
a photon has parity](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb12ba1ca-9d08-4048-9351-baaf9c5d1857%2Fcf535058-0638-4a6d-8795-cb7decab70b8%2Fmxgr1sk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The laboratory operation of a Laser is related to
the atomic transition problem. Let E - E, = ho
for two atomic states, u(@) be the radiation
density, N be the number of atoms in state 1, and
N2 that in state 2. B12 is the Enstein coffeicent for
absorption, B21 that transition probability for
emission, and A the spontaneous emission
coefficient. Find N2/N1
O B12/[A+ B21]
O B1zu(@)/[A + B21u(@)]
O B1zu(@)/A
O B1zu(@)/B21
O Au(@)/B12
Questio
Not yet answered
Marked out of
P Flag question
Forbidden transitions and selection rules suggest
that
O a photon has energy
O a photon has mass
O a photon has linear momentum
O a photon has angular momentum
a photon has parity
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