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(a) A dye molecule has emission cross section cm2 at nm, and fluorescence lifetime 3 ns. Assuming the transition is homogenously broadened, calculate the signal intensity at which the gain is reduced by a factor of 2.
(b) The Nd:glass transition has peak emission cross section cm2 at nm, and fluorescence lifetime 290 ?s. If the transition is homogenously broadened, determine the signal intensity at which the Nd:glass gain is reduced by a factor of 2. Repeat if the transition is inhomogeneously broadened.
Equipotentials between two parallel lines with a floating circular electrode. I dont need to know the exact potentials, What is the potential of the circular electrode
A 2500mL- flask is initially open to air at 24 celsius and 1 atm pressure. How many moles escape when the air is released
Two particles of masses and () are located 10 meters apart. Where is the center of mass of the system located
An air puck of mass 0.250 kg is tied to a string and allowed to revolve in a circle of radius 1.14 m on a frictionless horizontal table. What is the speed of the puck
A potter's wheel-a thick stone disk of radius 0.500 m and mass 125 kg-is freely rotating at 50.0 rev/min. Find the effective coefficient of kinetic friction between the wheel and rag
a a wire 1 m long is perpendicular to a magnetic field of 0.01 t. what is the force on the wire when it carries a
Four equal charges of +2.5×10-6 C are placed on the corners of one face of a cube of edge length 15.0 cm. A charge of -2.5×10-6 C is placed at the center of the cube. What is the magnitude of the force on the charge at the center of the cube?
a balloon filled with helium has a volume of 1.0 x 10-3 l at 20 degrees celcius. what will be the balloons volume at 30
At one instant a bicyclist is 49.0 m due east of a park's flagpole, going due south with a speed of 14m/s. Then 35.0 s later, the cyclist is 49.0 m due north of the flagpole, going due east with a speed of 14m/s.
The work function for cesium, 1.81 eV, is much lower than the work function for other metals. What is the photoelectric cut-off wavelength? What is the maximum electron kinetic energy when cesium is illuminated with light of 512-nm wavelength?
Assuming the cost of energy from the electric company is $0.115/kWh, compute the cost per day of operating a lamp that draws a current of 1.65 A from a 110-V line
A 45 g golf ball is pushed up a 30° ramp. The ball starts from rest and the length of the surface of the ramp is 5 m. What was the magnitude of the pushing force
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