A laser is a device that generates a narrow beam of coherent light through stimulated emission of radiation. It works by exciting photons with an energy source, causing them to emit more photons of the same wavelength and phase in a process called optical amplification. There are several types of lasers including solid state, gas, liquid, and semiconductor lasers that have various applications in medicine, communications, industry, science, technology, and the military.

1. LASER
DONE
BY
720823103059

2. What is
Laser?
A laser is a device that generates high-
intensity light through a process of optical
amplification based on the stimulated
emission of electromagnetic radiation. It takes
advantage of the quantum properties of
atoms that absorb and radiate particles of
light called photons. There are many types of
lasers, including gas lasers, fiber lasers, solid
state lasers, dye lasers, diode lasers, and
excimer lasers

3. How does a
laser work?
A laser is a special type of light that produces
a narrow beam of light in which all of the light
waves have very similar wavelengths. The
term "laser" stands for "Light Amplification by
Stimulated Emission of Radiation." Light
particles, called photons, are excited with
current causing them to emit energy in the
form of light. This light forms the laser
beam. The laser's light waves travel together
with their peaks all lined up, or in phase.

4. Types of
lasers
• continuous-wave lasers
• pulsed lasers
• solid state lasers
• gas lasers
• liquid lasers
• semiconductor lasers.

5. Applications
of lasers
• Lasers in medicine
• Lasers in communications
• Lasers in industries
• Lasers in science and technology
• Lasers in military

6. THANKYOU