Recent content by doomhalo

Ah I see, so \Delta E = \frac{hc}{\lambda^2} \Delta\lambda And then \tau \approx \frac{\lambda^2}{4\pi c \Delta\lambda} ? Thank you very much!

Hi there, I've just been having a little trouble with this short question from a past exam paper... Homework Statement "An atomic state has a dominant decay mode which produces an emission line of wavelength 6 \times 10^{-7} m and natural width 10^{-13} m . Estimate it's natural lifetime...