0
0
0

laser - choose a jigsaw puzzle to solve

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently, spatially and temporally. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond. Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; DNA sequencing instruments, fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.
Fountain. - A fountain in Duszniki Zdrój.
Play now!
Fountain.

Added month ago by Grażyna

157 2

For the patient - complicated puzzle
Play now!
For the patient

Added year ago by andi

23

Abstraction - a complicated puzzle
Play now!
Abstraction

Added year ago by andi

56 1

Star Wars Lego - Star Wars Lego Stormtroopers
Play now!
Star Wars Lego

Added year ago by beru

19

lampki kolorowe - dekoracyjna lampka w pokoju
Play now!
lampki kolorowe

Added over a year ago by ułóż puzzle

101

Winx Club - Winx Club : Tecna Transformacja  Mythix
Play now!
Winx Club

Added over a year ago by Natalia Wolanin

49

Do Siego Roku !!! - w kwiatach , bo lubię ...
Play now!
Do Siego Roku !!!

Added over a year ago by biedronka

69

Planetarium - Sondertermine_Technik_001
Play now!
Planetarium

Added over a year ago by Balduin

43