Grade 12 Physics Investigatory Project Certificate
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Questions and Answers

What is crucial for laser operation?

Population inversion

What does the acronym 'LASER' stand for?

Light Amplification by Stimulated Emission of Radiation

What is the fundamental theory behind lasers?

Stimulated emission

What type of materials do solid-state lasers use as their gain medium?

<p>Crystals or glasses doped with ions</p> Signup and view all the answers

What are the applications of solid-state lasers in medicine?

<p>Laser ablation for surgeries and various diagnostic procedures</p> Signup and view all the answers

What type of gases do gas lasers use as their active medium?

<p>Helium, neon, or carbon dioxide</p> Signup and view all the answers

What is the working principle of semiconductor lasers?

<p>Applying an electric current to the semiconductor</p> Signup and view all the answers

What are the uses of gas lasers in scientific research?

<p>Spectroscopy and as a light source in various experiments</p> Signup and view all the answers

Where are gas lasers used in industrial applications?

<p>Laser marking and cutting</p> Signup and view all the answers

What do semiconductor lasers find widespread use in?

<p>Modern technology</p> Signup and view all the answers

Explain the working principle of gas lasers.

<p>Gas lasers use gases like helium, neon, or carbon dioxide as their active medium. When electricity or another energy source is applied, these gases produce laser light through a process of stimulated emission.</p> Signup and view all the answers

What is the basic theory behind lasers and how does it relate to the coherent nature of laser light?

<p>The fundamental theory behind lasers involves stimulated emission, where an incoming photon triggers the emission of an identical photon by an excited atom. The coherent nature of laser light arises from the synchronized phase of emitted photons.</p> Signup and view all the answers

Discuss the applications of solid-state lasers in various fields.

<p>Solid-state lasers are used in precision cutting and welding in industries. In medicine, they are employed in laser ablation for surgeries and various diagnostic procedures. Scientific research also utilizes solid-state lasers for experiments and measurements.</p> Signup and view all the answers

Explain the working principle of semiconductor lasers and their widespread use.

<p>Semiconductor lasers, also known as laser diodes, use semiconductor materials like gallium arsenide to generate laser light by applying an electric current to the semiconductor. Semiconductor lasers are widespread in modern technology.</p> Signup and view all the answers

What is the aim of the project mentioned in the text and what are the key details to be incorporated?

<p>The aim of the project is to incorporate all necessary details related to lasers, including the laser definition, basic theory, types of lasers, uses of lasers, and application in daily life.</p> Signup and view all the answers

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