Opto Electronics – 19

19. In comparison to LED, LASER has :
      1. High emission frequency
      2. No tuning arrangement
      3. Narrow spectral bandwidth
      4. Provision for confinement
     Of these statements

(a) 1, 3, & 4 are correct
(b) 1, 2, & 3 are correct
(c) 1 & 3 are correct
(d) 2, 3, & 4 are correct

Answer : (c)

Explanation : No answer description available for this question. Let us discuss.

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