THE zonal harmonics in the Earth's gravitational field indicate its variations with latitude, averaged over all longitudes. The odd zonal harmonics, of degree 3, 5, 7, …, specify that part of the ...
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences The Royal Society is a self-governing Fellowship of many of the world's most distinguished ...
High-order harmonic generation (HHG) — a technique that converts light into much higher frequencies — is an essential tool for exploring otherwise inaccessible parts of the electromagnetic spectrum.
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