light waves do not need a medium to pass through, they can travel through a vacuum. Light from the Sun reaches Earth through the vacuum of space. The speed of light in air is very close to 300 000 ...

Researchers report their insights on the emerging field of complex frequencies excitations, a recently introduced scheme to control light, sound and other wave phenomena beyond conventional limits.

The effects of ultra-fast lasers that can change material states in attoseconds are finally understood, thanks to new Israeli ...

Refraction close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ray changes direction when refracted by a lens.

How noisy the fan is, based on a sound meter measurement of air, blade, and motor noise at the lowest speed setting. The MinkaAire Light Wave 52" Ceiling Fan is part of the Ceiling Fans test ...