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.
Last updated on Jul 17, 2025
-> The Railway Recruitment Board has scheduled the RRB ALP Computer-based exam for 15th July 2025. Candidates can check out the Exam schedule PDF in the article.
-> RRB has also postponed the examination of the RRB ALP CBAT Exam of Ranchi (Venue Code 33998 – iCube Digital Zone, Ranchi) due to some technical issues.
-> UGC NET Result Date 2025 Out at ugcnet.nta.ac.in
-> UPPSC RO ARO Admit Card 2025 has been released today on 17th July 2025
-> Rajasthan Police SI Vacancy 2025 has been released on 17th July 2025
-> HSSC CET Admit Card 2025 has been released @hssc.gov.in
-> There are total number of 45449 Applications received for RRB Ranchi against CEN No. 01/2024 (ALP).
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here
-> Bihar Police Driver Vacancy 2025 has been released @csbc.bihar.gov.in.