Government Engineering College, Bhavnagar Physics Assignment PDF

Government Engineering College, Bhavnagar Odd Semester (2024-25) (Physics) Assignment Module-5 LASER 1. What is LASER? Lists salient features...

Government Engineering College, Bhavnagar Odd Semester (2024-25) (Physics) Assignment Module-5 LASER 1. What is LASER? Lists salient features of Laser. 2. Why the process of spontaneous emission can’t use to amplify the radiation? 3. Explain how stimulated emission process amplifies the radiation. 4. Distinguish stimulated & spontaneous emission. 5. Establish relations between Einstein’s co-efficients and also discuss conditions for amplification of radiation. 6. Explain briefly the following terms. (i) Population Inversion (ii) Metastable State (iii) Pumping (iv) Active Medium & Active Centers 7. Explain construction and working system of Optical Resonator. 8. Lists various Laser beam characteristics. 9. Explain briefly construction & working system of Ruby LASER. 10. Explain briefly construction & working of He-Ne LASER with the help of energy level diagram 11. Discuss Holography technique. 12. Discuss various application of LASER in Science, Engineering and medicine in details. 13. In a He-Ne laser system the two energy levels of Neon involved in lasing action have energy values of 20.66 eV & 18.70 eV. Population inversion occurs between these two levels. What will be the wavelength of laser beam produced? What will be the population of metastable energy level with respect to the upper excited level at 300 K. Page 1 of 1