CS/B.Tech/ME/PE/SEM-8/ME-816/2013
2013
OPTOELECTRONICS AND LASER MATERIAL
PROCESSING
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Objective Type Questions )
1. Write brief answers for the following : 5 × 2 = 10
i) What are the coherent properties of two light beams ?
ii) What is the power measurement unit of a lens ? How is
it represented mathematically ?
iii) Explain the term "Population Inversion".
iv) Write down Snell's law of refraction.
v) State two industrial applications of LASER.
GROUP – B
( Short Answer Type Questions )
Write short notes any three of the following. 3 × 5 = 15
2.CO2 LASER.
3. LASER cutting.
4. Refraction through single lens (Double convex).
5. LASER surface treatment.
6. Advantages of LASER diode over LED.