Opto Electronics » Exercise – 1
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 correctSubject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
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