Question

The scientific principle involved in LASER is
(1) Kepler's law
(2) Faraday's law of electrolysis
(3) Lenz law
(4) Amplification by population inversion​

Answer 1

Laser is based on three separate principle:

a) stimulated emission within an amplifying medium

b) population inversion of electronics and

c) an optical resonator

Step-by-step explanation:

Laser:

• A laser emits a beam of electromagnetic radiation that is always monochromatic, collimated and coherent in nature.
• It is the abbreviation of Light Amplification by the Stimulated Emission of Radiation.

• It consist of three main components: a lasing medium,  a stimulating energy source and an optical resonato  and have a wide variety of uses in clinical medicine.
• It cause tissue damage by various mechanisms and these are mainly determined by power density of the beam and exposure time.

• It is imperative to be aware of the risks associated with laser use in terms of tissue damage  and fire hazards.
• Strict controls should be implemented governing the safe use of lasers in hospital practice, and all staff must be familiar with all safety measures to prevent injury and fires.

Answer 2

Amplification by population inversion

Explanation:

Population inversion : -

• Population inversion is the redistribution of atomic energy levels that take place in the system.

• Population inversion is the state where a higher energy state is more than a lower energy state.

• Atoms present in various energy states is constant.

• Absorption and emission is a continuing process.

• As stimulated emission is more probable than induced absorption we use it in LASER

• The probability of photon causing stimulated emission is more in population inversion state.

So, the scientific principle involved in LASER is amplification by population inversion