OSA meaning in Academic & Science ?

Answer:

What is Optical Spectrum Analyzer mean?

An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light or a unit directly proportional to the photon energy, such as reciprocal centimeters or electron volts, which has a reciprocal relationship to wavelength.

A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometers may operate over a wide range of non-optical wavelengths, from gamma rays and X-rays into the far infrared. If the instrument is designed to measure the spectrum on an absolute scale rather than a relative one, then it is typically called a spectrophotometer. The majority of spectrophotometers are used in spectral regions near the visible spectrum.

In general, any particular instrument will operate over a small portion of this total range because of the different techniques used to measure different portions of the spectrum. Below optical frequencies (that is, at microwave and radio frequencies), the spectrum analyzer is a closely related electronic device.

Spectrometers are used in many fields. For example, they are used in astronomy to analyze the radiation from objects and deduce their chemical composition. The spectrometer uses a prism or a grating to spread the light into a spectrum. This allows astronomers to detect many of the chemical elements by their characteristic spectral lines. These lines are named for the elements which cause them, such as the hydrogen alpha, beta, and gamma lines. A glowing object will show bright spectral lines. Dark lines are made by absorption, for example by light passing through a gas cloud, and these absorption lines can also identify chemical compounds. Much of our knowledge of the chemical makeup of the universe comes from spectra.

reference

Full Form	Category
Office of Student Affairs	Academic & Science
Optical Society of America	Academic & Science
Open Society Archives	Academic & Science
Open Simulation Architecture	Academic & Science
Open Systems Architecture	Academic & Science
Office of Student Activities	Academic & Science
Orissa Society of America	Academic & Science
Open Service Architecture	Academic & Science
Ontario Society of Artists	Academic & Science
Orissa Society of Americas	Academic & Science
Optical Spectrum Analyzer	Academic & Science
Office of the State Architect	Academic & Science
Office of the Science Advisor	Academic & Science
Optical Society A	Academic & Science
Open Space Agency	Business
Orsini Security Agency	Business
On Shelf Availability	Business
Office of the State Auditor	Business
Old Students Association	Community
Oakland School for the Arts	Community
Order of Saint Augustine	Community
Oregon Student Association	Community
Old School Arcade	Community
Oshkosh Student Association	Community
Office Systems Architecture	Computing
Out of Service Area	Computing
Open Services Architecture	Computing
Optical Subassembly	Computing
Object Oriented Systems Analysis	Computing
Open Source Architecture	Computing
Out of Band Services Architecture	Computing
Operating System Administrator	Computing
Oracle Sales Analyser	Computing
Over Sampling	Computing
Object Storage Architecture	Computing
Open Solutions Alliance	Computing
Open Scripting Architecture	Computing
Open Standard Architecture	Computing
Open Service Access	Computing
Online Safety Alliance	Computing
Open Society Archive	Computing
Open System Authentication	Computing
Online Services Advisor	General
Open Structure Anti	General
Open Systems Adapter	General
Only Store Administrative	General
Observability Subspace Algorithm	General
Outstanding Silliman Awardee	General
Orangutans Seem Alert	General
Omicsoft Sequence Aligner	General
Obstructive sleep apneas	General
Out of Station Allowance	General
Optical Spectrum Access	General
Open Structure Antiglare	General
Opportunity Success and Ambition	General
Olancho San Agustin	General
Over Speed Alarm	General
One Step Ahead	General
The Office Of Secret Actions	General
Output Stuck At	General
Online Sexual Addiction	General
OutStanding Achievement	General
Sleep Apnea	General
Organization of Staff Analysts	General
Online Signatory Application	General
Outstanding Student Award	General
Online Scholarship Application	General
Obstructive Sleep Apnoea	General
on-site assem bly	General
Operational Security Assurance	General
Office of Shared Accountability	General
Optical Shop of Aspen	General
Office of Services to the Aging	General
Office of Scientific Affairs	General
Official Secrets Act	Governmental
Open Space Alliance	Governmental
Organic Seed Alliance	Governmental
AUSA ROAD	Indian Railway Station
Office Support Assistant	Jobs
Obstructive Sleep Apnea	Medical
Overhead Squat Area	Medical
Obstructuve Sleep Apnea	Medical
Operational Services Agreement	Military and Defence
Office of Special Affairs	Military and Defence
Office of The Secretary of The Army	Military and Defence
Operational Support Airlift	Military and Defence
Open System Architecture	Military and Defence
Omnibus Service Authority	Networking
Osage	Regional
Operational Support Area	Space Science
Outdoor Soccer of America	Sports
Omaha Sports Academy	Sports
Ontario Soccer Association	Sports
Online Soccer Academy	Sports
Oklahoma Soccer Association	Sports