Similar to 電弧

Beam-powered propulsion

Laser beam welding

Laser cutting

Red edge

Lens flare

Lenticular printing

Rembrandt lighting

Exposure (photography)

Lorentz–Lorenz equation

29th century BC

28th century BC

27th century BC

26th century BC

25th century BC

24th century BC

23rd century BC

22nd century BC

20th century BC

19th century BC

18th century BC

17th century BC

16th century BC

15th century BC