Refraction can cause laser beams to bend along the Earth's surface, making it appear that the Earth is flat. Hotspots ranked Start the day smarter ☀️ Funniest cap messages Get the USA TODAY app ...

just cranked out a pulse that makes it the most powerful laser beam in the country. ZEUS’ peak power topped out at 2 petawatts, or a staggering 2 quadrillion watts, roughly 100 times the entire ...

Knowledge of a laser beam's shape and output-power distribution is critical for optimizing laser performance. Neil Savage summarizes the latest beam-profiling products on the market.