light waves

Electromagnetic visible spectrum

Light waves are electromagnetic radiation visible to the human eye, oscillating electric and magnetic fields that travel through space.

Unlike sound waves, light waves need no medium—they move through vacuum at roughly 186,000 miles per second.

Different wavelengths produce different colors, from red (longest) to violet (shortest).

Light waves from distant stars take years to reach Earth.

Related

interference · double slit · spectrum · laser · visible · Huygens' principle · frequency · polarization · radiation · propagation · reflection · illumination · color · brightness · oscillation · beam · ultraviolet · UV rays

Categories
Opposites
wave type in physics

light wavessound waves

Pressure disturbances carrying noise

seismic waves · pressure waves · gravitational waves

wave-particle duality

light wavesphotons

Discrete packets of radiance

corpuscles · quanta

electromagnetic spectrum visibility

light wavesradio waves

Low-frequency electromagnetic radiation

gamma rays · X-rays · darkness · infrared radiation · ultraviolet radiation

Family

light, delight, lightly, highlight, waves, delightful, lighting, delighted, lighted

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G