Applied Physics I: Chapter 10: Applied Optics - Lasers
Differences between stimulated and spontaneous emission of radiation
Differences between stimulated and spontaneous emission of radiation
DIFFERENCES BETWEEN
STIMULATED AND SPONTANEOUS EMISSION OF RADIATION
Stimulated
emission
1.
An atom in the excited state is induced to return to ground state, thereby
resulting in two photons of the same frequency and energy is called stimulated
emission.
2.
The emitted photons move in the same direction and is highly directional.
3.
The radiation is high intense, monochromatic and coherent.
4.
The photons are inphase (i.e.) there is a constant phase difference.
5.
The rate of transition is given by R11(st) = B21 ρv N2
Spontaneous
emission
1.
The atom in the excited state returns to ground state thereby emitting a
photon, without any external inducement is called spontaneous emission.
2.
The emitted photons move in all directions and are random.
3.
The radiation is less intense and is incoherent.
4.
The photons are not in phase (ie.) there is no phase relationship between them.
5.
The rate of transition is given by R21(sp) =A21 N2
Applied Physics I: Chapter 10: Applied Optics - Lasers : Tag: Applied Physics : - Differences between stimulated and spontaneous emission of radiation
Applied Physics I: Chapter 10: Applied Optics - Lasers
Under Subject
Applied Physics I
PH25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Related Subjects
English Essentials I
EN25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
தமிழர் மரபு - Heritage of Tamils
UC25H01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Calculus
MA25C01 Maths 1 M1 - 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Physics I
PH25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Chemistry I
CY25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Makerspace
ME25C04 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Computer Programming C
CS25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Computer Programming Python
CS25C02 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Fundamentals of Electrical and Electronics Engineering
EE25C03 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Introduction to Mechanical Engineering
ME25C03 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Introduction to Civil Engineering
CE25C01 1st Semester Civil Department | 2025 Regulation | 1st Semester 2025 Regulation
Essentials of Computing
CS25C03 1st Semester - AID CSE IT Department | 2025 Regulation | 1st Semester 2025 Regulation
Applied Physics I Laboratory
PH25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Applied Chemistry I Laboratory
CY25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Computer Programming C Laboratory
CS25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Computer Programming Python Laboratory
CS25C02 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Engineering Drawing
ME25C01 EEE Mech Dept | 2025 Regulation | 2nd Semester 2025 Regulation
Basic Electronics and Electrical Engineering
EE25C04 1st Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation