Q 1 / In a sapphire laser with a wavelength of 694.3 nm, the sapphire crystal is 0.1 m long and the reflectivity of the two-time mirrors is 97% and 90%. If the amount of loss is 10% for each complete cycle. Calculate the wind (gain) coefficient of the threshold? And what is the inverse qualification to obtain such a profit coefficient if you know that n= 1.82 change in frequency v = 3×10^12 HZ and the second residence time is equal to 200×10^-6sec​