Engineering Physics

Review Questions

1. Explain the principle, construction and working of a semiconductor laser.

    

   (Set-3–June 2005)

2. Explain the purpose of an active medium in a gas laser.

    

   (Set-3–Nov. 2004)

3. State the applications of lasers.

    

   (Set-1–Nov. 2003), (Set-2–Nov. 2003), (Set-3–Nov. 2003)

4. Derive the relation between the probabilities of spontaneous emission and stimulated emission in terms of Einstein’s coefficients.

    

   (Set-4–Sept. 2007), (Set-1, Set-3–May 2007), (Set-2–Nov. 2004)

5. Explain the characteristics of a laser.

    

   (Set-1–May 2008), (Set-2, Set-3–Sept. 2007), (Set-2–Sept. 2006), (Set-1–Nov. 2004)

6. With the help of suitable diagrams, explain the principle, construction and working of a ruby laser.

    

   (Set-4–Nov. 2004)

7. What do you understand by population ...