Compared to green levels, red laser levels are a much more accessible option. A similar product, the Bosch red cross-line level, costs only $89.97 at Home Depot.

The classic double-slit experiment leads to characteristic interference patterns. Credit: Russell Knightly/SPL A celebrated experiment in 1801 showed that light passing through two thin slits ...

Nichia, a developer and manufacturer of gallium nitride-based LEDs and the inventor of high-brightness blue and white LEDs, has started in-house production of high-power red laser diode (LD) chips.