An atom with two energy levels corresponding to the transition (λo= 1 μm, tsp = 3, ms, δν = 107 hz, lorentzian lineshape) is placed in a resonator of volume v= 100 cm3 and refractive index n = 1. two excite modes (one at center frequency νo and the other at νo+ δν) are excited with 1,000 photons each. (a)determine the probability density pst for stimulation emission. the peak transition cross section is given by σ(ν0)=λ02/2π.(b)estimate the optical intensity (in mw/cm2) of this resonator.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

The answer would be a) -80of

Answer59.2kg; /