
In a ruby laser, the stimulated emission is due to the transition from
(A) metastable state to any lower state
(B) any higher state to lower state
(C) metastable state to ground state
(D) any higher state to ground state
Answer
161.1k+ views
Hint: In order to answer this question, we should first understand the meaning of a ruby laser. A ruby laser is a solid-state laser and it utilises the synthetic ruby crystal as its laser medium. It is among one of the few solid-state lasers that produce visible light and it emits a light which is red in colour.
Complete answer:
A ruby laser usually consists of a ruby rod which should be pumped with a very high energy, generally from a flashtube, in order to achieve a population inversion. The rod is placed between two mirrors which form an optical cavity which oscillate the light that is generated by the ruby's fluorescence thus resulting in stimulated emission.
Ruby is one of the very few solid state lasers which generate light in the visible range of the spectrum, lasing at \[694.3\]nm, in a red colour, with a narrow line width of \[0.53\] nm. This laser is a three-level laser. In this type of laser, the stimulated emission is because of the transition from a metastable state to a ground state.
Therefore, the correct answer is option C.
Note: It is important to note that ruby also absorbs some of the light at its lasing wavelength. In order to overcome this absorption, the entire length of the rod should be pumped, thus leaving no shaded areas near the mountings. The active part of the ruby is the called the dopant and it consists of chromium ions suspended in a synthetic sapphire crystal.
Complete answer:
A ruby laser usually consists of a ruby rod which should be pumped with a very high energy, generally from a flashtube, in order to achieve a population inversion. The rod is placed between two mirrors which form an optical cavity which oscillate the light that is generated by the ruby's fluorescence thus resulting in stimulated emission.
Ruby is one of the very few solid state lasers which generate light in the visible range of the spectrum, lasing at \[694.3\]nm, in a red colour, with a narrow line width of \[0.53\] nm. This laser is a three-level laser. In this type of laser, the stimulated emission is because of the transition from a metastable state to a ground state.
Therefore, the correct answer is option C.
Note: It is important to note that ruby also absorbs some of the light at its lasing wavelength. In order to overcome this absorption, the entire length of the rod should be pumped, thus leaving no shaded areas near the mountings. The active part of the ruby is the called the dopant and it consists of chromium ions suspended in a synthetic sapphire crystal.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

Young's Double Slit Experiment Step by Step Derivation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

JEE Energetics Important Concepts and Tips for Exam Preparation

JEE Isolation, Preparation and Properties of Non-metals Important Concepts and Tips for Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Electric field due to uniformly charged sphere class 12 physics JEE_Main

Displacement-Time Graph and Velocity-Time Graph for JEE

Uniform Acceleration

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

JEE Advanced 2025: Dates, Registration, Syllabus, Eligibility Criteria and More

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

Degree of Dissociation and Its Formula With Solved Example for JEE

Free Radical Substitution Mechanism of Alkanes for JEE Main 2025

If a wire of resistance R is stretched to double of class 12 physics JEE_Main
