Its second harmonic generation ( SHG ) coefficient is about three times higher than Mohs hardness of about 5.
22.
The second harmonic is in the middle of the string and sounds an octave higher than the string's pitch.
23.
Of these, only the bottom three were series of natural harmonics only descended as far as the second harmonic.
24.
:It is because the red receptor in the human eye has a slight response to second harmonic wavelength also.
25.
The fundamental frequency of the pulse is usually about 40 kHz, and is of a lower amplitude than the second harmonic.
26.
The generation of the second harmonic in crystals is a nonlinear process that requires high peak power, unlike the previous setup.
27.
The second harmonic of the CF-FM pulse is typically the dominant ( highest amplitude ) sound, and is usually about 80 kHz.
28.
Any frequency lying below the cutoff and having its second harmonic above the cutoff can be amplified, that is an octave bandwidth.
29.
Surface plasmons have been used to enhance the surface sensitivity of several spectroscopic measurements including fluorescence, Raman scattering, and second harmonic generation.
30.
In monolayer microscopy the second harmonic signal is magnified and surface features are imaged with a resolution on the order of a wavelength.
