Amanda Smith is a freelance journalist and writer. She reports on culture, society, human interest and technology. Her stories hold a mirror to society, reflecting both its malaise and its beauty.

Abstract: Optical parametric oscillators (OPOs) that rely on third-order nonlinearity convert two pump photons of the same frequency into a signal photon with a higher frequency and an idler photon ...

From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there are techniques for everyone. Learn how to use metering, considering composition and shoot everything from ...