1) Write down the types of LED.
2) What do you mean by a stimulated emission time?
3) What do you mean by a Population inversion?
4) What do you mean by a Mode locking of Laser?
5) Describe DBR (Distributed Bragg Reflector) Laser.
6) Write down threshold condition for Lasing?
7) What is the essential condition for Lasing?
8) Describe Emission, Absorption, and Radiation of Laser.
9) Describe the construction and working of different Display devices.
10) Describe the following terms
(i) Photo luminescence
(ii) Cathode luminescence
(iii) Electro luminescence
(iv) Injection luminescence
11) Write brief notes on Mode locking of semiconductor laser
12) Describe the application of laser in detail.
13) Describe about the different Classification of laser in detail.