The laboratory operation of a Laser is related tothe atomic transition problem. Let E - E, = hofor two atomic states, u(@) be the radiationdensity, N be the number of atoms in state 1, andN2 that in state 2. B12 is the Enstein coffeicent forabsorption, B21 that transition probability foremission, and A the spontaneous emissioncoefficient. Find N2/N1O B12/[A+ B21]O B1zu(@)/[A + B21u(@)]O B1zu(@)/AO B1zu(@)/B21O Au(@)/B12QuestioNot yet answeredMarked out ofP Flag questionForbidden transitions and selection rules suggestthatO a photon has energyO a photon has massO a photon has linear momentumO a photon has angular momentuma photon has parity

The radiation density is u(w), N1 is the number of atoms in state 1, N2 is the number of atoms in…

Answered: the atomic transition problem. Let E2-…

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3. a) Alpha particles of the same initial speed are shot at the same intensity toward gold, silver, and aluminum foils of the same thickness. They are observed at a detector at a fixed scattering angle, 0 0°. What would the ratios of the number of alpha particles scattered by the gold and silver foils to the aluminum foil, No Au 13). NaAl and respectively, be? (ZAu = 79, ZAg = 47, ZAI Na Ag NaAl b) Compare the number of a particles of fixed kinetic energy scattered through an angle of 10° (call this Na(10°)) with the number scattered through an angle of 20° (Na (20°)) for Rutherford scattering by a thin gold foil of fixed thickness. Compute Na (10⁰) Na (20°). p2 Rutherford's scattering model assumes that the alpha particles experience a Coulomb repulsion, F = KqZe from the nucleus of the foil's atom. If, in a head-on collision the alpha particle has enough energy to get inside a uniformly charged Kqa Zer nucleus of radius R, the force law would change to F = R³ " point-nucleus…
Constants Ideal gas constant: = 8.314 J K mol- = 0.083 dm bar K mol = 0.082 dm atm K mol Avogadro's constant: NA = 6.022x1023 mol-! Boltzmann constant: k 1.38x1023 J K Speed of light: c = 3 x 10% m s Planck's constant: h = 6.626x1034 J s 1 bar = 105 Pa 1 atm = 101325 Pa Relations U = NKT²(n = + k In Q S = %3D A = -kT In Q G = -NkT In) R.
In the 1980s, the term picowave was used to describe food irradiation in order to overcome public resistance by playing on the well-known safety of microwave radiation. Find the energy in MeV of a photon having a wavelength of a picometer.
https://www.compadre.org/PQP/quantum-need/prob4_5.cfm *Link to HW problem