Question
Download Solution PDFA _______ is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Laser
- A laser is a device for producing simulated emissions of electromagnetic action.
- Laser stands for light amplification by stimulated emission of (electromagnetic) radiation.
- Laser is used in laser printers, barcode scanners, DNA sequencing instruments, laser surgery, skin treatments, cutting and welding materials, measuring range and speed, etc.
- Luminescence is the spontaneous emission of light by a substance not resulting from heat; or "cold light".
Additional Information
- Dispersion: It is defined as the spreading of white light into its full spectrum of colors (in order violet, indigo, blue, green, yellow, orange, and red).
- Radiation that spreads out in different directions from a radiation beam when the beam interacts with a substance is defined as Scattered radiation.
- Stimulated emission, in laser action, is the release of energy from an excited atom by artificial means.
- Stimulated emission occurs when a photon, with an energy level equal to the energy gap, interacts with the electron.
- Spontaneous emission takes place without interaction with other photons, and the direction and phase are random while Stimulated emission takes place when the excited electron interacts with another photon.
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