Question

Write the meaning of laser and two uses.

Answer 1

HintLASER means "Light Amplification by Stimulated Emission of Radiation."
Laser is a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation.
It is used in various fields such as Meteorology and in the Medical field.

 Complete step-by-step solution:
The full form of LASER is "Light Amplification by Stimulated Emission of Radiation."
We can define laser as below:
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.
Let us know about how a laser works:
A laser is created when the electrons in atoms in special glasses, crystals, or gases absorb energy from an electrical current or another laser and become “excited.” The excited electrons move from a lower-energy orbit to a higher-energy orbit around the atom’s nucleus. When they return to their normal or “ground” state, the electrons emit photons (particles of light).
Now let us discuss about the uses of laser:
Lasers are used in optical disk drives, laser printers, barcode scanners and many more.
They are used in various fields
In the Medical field they are used to improve vision during eye surgery on the cornea, repair a detached retina of the eye or to remove kidney stones.
In the Defense field, the military uses laser guided weapons and missiles.

Note:-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 which is coherent.