Fluorescence occurs when a high energy photon pumps a molecule up to an excited energy level. The molecule then decays to a level partway down by emitting another photon. Suppose we pump up a molecule with the three energy levels indicated from level E0 to level E2 using a 395 nm photon. The intermediate level, E1, has an energy 0.7 eV about the ground state, E0. What is the wavelength of the fluorescent photon emitted when the molecule decays from level E2 to level E0
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Physics, 21.06.2019 19:00, isabellemdeakin
An object is located 30.0 cm from a concave mirror. the focal length is 15.0 c,. what is the image distance? a. 30.0 cm b. -10 cm c. 10.0 cm d. -30.0 cm
Answers: 1
Physics, 22.06.2019 10:20, studyowl9192
Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?
Answers: 1
Physics, 22.06.2019 10:50, afonseca73
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
Physics, 22.06.2019 22:30, dlsmith68
Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s. assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.
Answers: 1
Fluorescence occurs when a high energy photon pumps a molecule up to an excited energy level. The mo...
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