Physics, 20.03.2020 21:55, jmt13happy
Consider a ruby crystal with two energy levels separated by an energy difference corresponding to a free-space wavelength lambda_0 = 694.3nm, with a Lorentzian lineshape of width Delta v = 330GHz. The spontaneous lifetime is t_sp = 3ms and the refractive index of ruby is n=1.76. What value should the population difference N be to achieve a gain coefficient gamma(v_0) = 0.5 cm^-1 ? How long should the crystal be to provide an overall gain of 4 at the central frequency when gamma(v_0) = 0.5 cm^-1 ? The gain coefficient at central wavelength for Lorentzian lineshape is given as: gamma (v_0) = N(lambda_0/2 pi n)^2 middot 1/t_sp Delta v
Answers: 3
Physics, 22.06.2019 13:30, Travisbennington
Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline
Answers: 1
Physics, 22.06.2019 14:40, sherlinejules1
You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
Answers: 2
Physics, 22.06.2019 17:00, QueenNerdy889
Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.
Answers: 3
Consider a ruby crystal with two energy levels separated by an energy difference corresponding to a...
Mathematics, 30.09.2019 23:30
English, 30.09.2019 23:30
History, 30.09.2019 23:30
Mathematics, 30.09.2019 23:30
History, 30.09.2019 23:30
English, 30.09.2019 23:30