If a Q-switched Nd:Yag laser generates optical pulse with l = 1064 nm has a spectral width of 1.13 Å, the longitudinal coherence length (in mm) of the light beam is:

Scientific classification

Answer59.2kg; /

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.